@ Thunderclap,
I have owned in the past several Onkyo units the only one I had problems with was my NR818, HDMI board went out sent it in they repaired it for free. I was using it as a pre-pro running Emotiva amp's XPA-2 alone with the XPA-5 driving Polk LSi's the whole line. My oldest Son has a Yamaha 1050 outstanding unit, he has my EMO amps and my LSi's I moved into a small apartment so sold all my gear to him well just about gave it all to him, his wife and him built a new home soo, but anyways I can say this the TX-NR656 I have is driving Polk signature series 60 L/R mains, without a doubt to me and I am just being subjective here, it is a huge Improvement over my NR818 in sound quality. Having had a Parasound 2100 pre-amp in my set-up with the NR818 was the main reason I added it was I found the NR818 was a lil "Tinny" sounding. Sorry for the long post. But to me what Onkyo has done by adding, the PLL, alone with VLSC, and adding the AKM chip is a huge Improvement. It took me a few weeks to decide which unit I was going to get and yes Yamaha was at the top of my list, but from a price point when the price drop to under 4 bills on the NR656 I went with it. Should I have gotten one with pre-amp outs? again I live in a small apartment for now. It is setup in a 5.1 for now To date the NR656 is up and running with out a hitch, or with any bugs or hiccups. But who knows, I just hope the "Force" is strong with this unit. My NAD pre-pro back in 2012 had HDMI board issues, 3 g's that unit set me back for. Just a note, this Forum is one of the better one's to come and hang out in, what I have found is the Old Timers in here won't recommend a add on amp if you really don't need one. I for one never "bash" someone's gear to me it's not what this hobby is about. I have had gear from many out there, from Carver, Sony ES, NAD, EMO, Yamaha and so on. I can say this, to me, with all the new audio formats for surround, DTS:X, Atmos and so on, is why I love this hobby so much it's always changing. Coming from tube gear all the way back in the 70's from one of my first set-ups till now, yeah loving it!. Again sorry for the long post.