I think a lot of the devil of a/v receivers lays in the overall engineering and thought process that goes into every aspect of the design. This is rarely tested by reviewers who just sit down and listen to the audio and, if you are lucky, look at the video quality of the main zone.
I have a Denon 3805 - great receiver for sure. But, the speed of the receiver seems to me to be far slower than the 2500. That's something that seems significant to me to point out in the 'have it now' generation we are in. The Denon is significantly slower in powering on and switching inputs when compared to the Yamaha.
I quite often see receivers utilize zone 2 capabilities, which are almost NEVER tested by reviewers. Is it really so hard to run a set of wires and an IR repeater to another room guys? So, they never discuss how easy zone 2 is to setup and control. They never test the audio quality for zone 2. They never even see if it works halfway decent.
After a quick look for what Pioneer has done... There is no indication that via RS-232 control that you can activate any of the additional zones. You only have control over the main zone. This leads me to the question of what added value is there for these extra zones from the receiver and are there discrete IR codes so other rooms can utilize them easily?
I know with both the 3805 & 2500 receivers that zones 1, 2, and 3 are all completely controlled independently via RS-232 and there are fully functioning macros that support those products. I know how perfectly zone 2 & 3 operation is and how wonderfully it can support a whole house audio system with the receiver as the hub. So, you can listen to some good music in the study, while the kids watch a movie, and your wife is upstairs. Everyone can listen to what they want easily.
I would add that I am wondering how I am going to hook my DVD player, HD cable, and PS2 up when there are only TWO component inputs on the Pioneer. Hello! If you aren't adding DVI & HDMI then 3 component inputs is now an absolute minimum on a mid-level receiver unless your TV has lots of inputs and you want to run lots of cables directly to it.
Don't get me wrong, I have used Pioneer, Denon, Yamaha, Rotel, Sony, etc. receivers and Pioneer has worked well as a one one unit just running a theater as most others are as well. But, when put in as part of a more advanced setup where the full capabilities of the receiver are being put to the test, the Pioneer fell short of the Denon and Yamaha units, with Yamaha being a slight step ahead of Denon in overall engineering for the complete package. Very slight step.