(The following is from a 
review that I wrote for Amazon, hence my wording and "star" ratings below.  I didn't add a video to that review, but I did record some video if people here are interested.  I'd have to edit it, though, and add a voice over.)
I had the opportunity to audition both this model and the Denon  AVR-E400, and while both have their advantages, I'd choose this Onkyo in  the end.
I read about and discuss receivers on an audio/video  forum (Audioholics) a lot, and the things that I recommend that you look  at when shopping are: connections (does it have everything that you  want/need), auto calibration (a huge plus, IMO), features (can it do  everything that you want), power (can it play as loud as you want and  still sound good), ease of use, and the remote control. Price, of  course, also weighs into it - I never want to spend more than I have to  in order to get what I want, but I don't want to spend less and then be  unhappy for years because I bought something that doesn't do what I  want.
BOTTOM LINE
If I were buying a  receiver in this price range today, I'd buy the Pioneer VSX-1123.   That's almost exclusively because I prefer Pioneer's MCACC auto  calibration system over Audyssey (explained below), and the VSX-1123 has  about the same connectivity and features as this model.  If I wanted a  receiver with Audyssey in this price class, I wouldn't hesitate to buy  this receiver.  While it is less refined than the Denon in regards to  setup and the onscreen menu system, it wins hands down with its  connections and features.  If you're interested in my reasons, I've  provided details below.
DETAILS
I wrote a pretty long review for the 
Denon AVR-E400,  which is also a nice receiver to consider.  I'm providing similar  information below.  The details section is a bit lengthy, but I think  that $500-$600 is a lot of money, and I hope that you find it helpful in  your search for a new receiver.
Connections: 4.5 Stars
This  Onkyo offers a lot compared to other 2013 receivers in this price range.   A phono input is rare these days, even more so on a ~$500 receiver.  A  big plus, IMO, is that even though you can't run 7.1 in your main  system and a pair of speakers in a second zone at the same time, the  Onkyo has enough connections for you to hook up all of those speakers  and toggle between them in the menu system.  That's nice because other  receivers like the Denon AVR-E400 would require you to physically  connect/disconnect speakers to pull that off.  The dual-HDMI outputs is  also very nice, and something that I found lacking on the Denon.
Auto Calibration: 3 Stars (might be 5 stars for you, though)
Auto  calibration is a wonderful thing, and if you've never used it, I think  that you'll love it. Audyssey seems to work pretty well and sounds good  in the location where I set up the mic and ran the calibration. My  biggest complaint, and why I won't be using this receiver, is that it  cannot store multiple configurations. In my room, I have two main  seating locations - one is centrally located relative to the speakers,  while the other is off to the side. The relative distances between the  speakers and those two locations (and hence the optimal timing and  volume levels for each speaker) are significantly different. MCACC (at  least the version on my Pioneer and the VSX-1123) can store up to six  configurations, so I can have one for the central location and another  one for the side location. Audyssey, at least on this receiver, can't do  that. I can place the mic in both locations during setup, but it still  sets the timing based on the first mic location. If you have a seating  arrangement in your room where everyone sits pretty close, then this  might not matter to you, and you very well might consider Audyssey to be  a five star system. A lot of people love it. I just didn't realize that  it couldn't do multiple configurations until I started using it, so I  wanted to point it out. That was a big disappointment to me. One other  note - while it will ask you during Audyssey setup if you want to turn  on Dynamic Volume (which applies dynamic range compression), it  automatically turns on without asking Dynamic EQ (which is a more  advanced version of the old Loudness controls). If you don't like  Dynamic EQ, you need to disable it individually for every input.
Features: 4 Stars
It  has pretty much everything that I want. I love the ability to rename  the inputs (e.g. "PS3"), but I do wish that it had an input selector  knob (or set of buttons) compared to the series of input buttons on the  front panel. HDMI pass through in standby mode is also very nice. The  networking features (like internet radio and DLNA) are also cool, but  not something that I'll use often. I never could get the Wi-Fi to  connect (even though it could see networks), but it worked great over a  hard line.  One thing this is outstanding is that you can access the  menu system through the front panel - not all receivers can do that.  If  you've ever lost your remote control, you know why I think that's so  nice.  

  It's not a show stopper to me if a receiver doesn't have it,  but it's a great feature if it does.  I also really like how this  receiver can decode DSD from SACDs.  A couple of nits, though: (1) I do  wish that I could set the volume display to relative values (i.e. dB  offset from the reference level) versus it's absolute 0-80 (I think it's  80) scale.  They might update that ability in a firmware release,  because other Onkyos will let you select which scale you want, and (2) I  wish that the front panel display would show the sound mode in large  letters, versus what it does which is show the input source in large  letters and the sound mode in incredibly small text that I have to be  right up next to it to read.  The Denon actually shows both in large  letters, which is nice.
Power: 5 Stars
This has plenty of  power for me. I don't tend to listen very loudly, so I don't need a lot  of power. However, I checked out its capabilities at pretty loud volumes  just like I did for the Denon (and the following is from that review  because it applies here). One of my test cases to check out power is  Fleetwood Mac's "The Dance" DVD. I know, I know..."How old is this guy?"  

 I use it because it's 5.1 and therefore uses five of the amp  channels to some extent, and because it has short dynamic power  requirements for things like guitar string plucks. The reason that I  added a power amp to my first Pioneer, besides the real reason of just  wanting to try one out 

, is that I could tell that the music wasn't as  crisp and clear at high volumes. For lack of a better word, it sounded  muffled. The dynamics just weren't there, and it's because that Pioneer  didn't have enough juice for the peaks (like guitar string plucks and  cymbals) at higher volumes (at my normal listening volumes, though, that  Pioneer was fine). So, I tried that exact same disc with this receiver -  and it did great. Even with it being MUCH louder than I'd ever normally  listen, the dynamics were still there. No need for any external  amplification in my case, which is nice because this amp doesn't support  that capability.
Ease of Use: 4 Stars
Honestly, I have no  trouble using receivers that some other people consider complicated, so  I'm probably not the best judge. This receiver, though, does seem very  easy to use. While the Denon has a class leading menu system that makes  this menu seem clunky in comparison, the menu on this Onkyo is a lot  more refined than the one on my 2009 Pioneer.  So, it's all relative.   Overall, setup was easy as is using it from day to day.  I'm not sure if  this falls under this category, but I experience some glitches with the  HDMI connections in that they seemed to lose sync (or whatever the  right term is) occasionally.  The screen would turn black (or black with  white lines moving on it) and I'd lose audio.  If I switched to another  input source and then back again (just clicking them on the remote),  then it synced back up and worked fine.  I have hopes that a firmware  update will fix that.
Remote: 5 Stars
Here's one reason that  I'd pick this over the Denon.  I really like this remote.  The Denon  doesn't have a universal remote, but this one does (as has every other  receiver that I've owned since the mid-90s).  It's really easy to use,  although some might find the smaller buttons a bit challenging.
Build Quality: 4 Stars
This  unit seems to be nice and solid.  It's built like most receivers that  I've owned in this price range and doesn't really stand out (which isn't  a bad thing).  The volume knob seems a bit cheap, but I use the remote  most of the time and don't really care.  Onkyo has gotten a bad rep  lately for running hot and having consequently reduced reliability, but  only time will tell if that impacts this receiver.  This model does have  a large (yet quiet) fan to help cool the electronics off.  The fan  pulls air from the bottom to the top, so you'll want to leave some space  above the receiver (which is true for most receivers, whether they have  fans or not, to help air movement and keep them cooler).  I haven't  noticed any excess heat or had issues with the fan, yet.
Packing: 3 Stars
I  added this section to the Denon review because I felt that they did a  great job with packing that should be mentioned.  The packing on this  Onkyo was more standard.  Nothing great, nothing horrible.  Just a plain  cardboard box with some printing on it.  You have to get the receiver  and the foam packing all out of the box and then pull the packing off  each side before you can set the receiver down, which is a bit awkward.   That's an area where the Denon was easier to deal with.
Overall: 4 Stars
The  inability to store multiple configurations for Audyssey in my living  room is too big of a drawback for me and why I gravitate to Pioneer's  MCACC system.  Those of you that sit in one location wouldn't have that  complaint and might just love this receiver.  This is a good unit with  some nice features, plenty of power, and an excellent set of  connections.  It deserves some serious consideration, IMO.  If you have  any questions, please feel free to leave a comment and I'll respond as  soon as I can. Thanks.