I won't have a chance to really put this receiver to the test until this weekend, but here are a few brief but interesting (I hope!) observations:
First, for this receiver you really need to read the manual as far as initial setup is concerned. For example, I only have 4 speakers right now (Front L/R, Back Surround L/R) in my living room. I thought that hooking up my surround speakers to the "rear surround L/R" terminals would make sense (especially when their diagram for "surround" speakers have them located off to the side in the rear, where my in-wall speakers are definately NOT placed). However, when I ran the Audyessy setup procedure I kept getting "speaker errors".
It turns out there is a chart on Page 18 that describes how to connect speakers in the rear based on your configuration of from two to nine speakers in your room. This is NOT a suggestion. You HAVE to do it this way. Once I used the "surround L/R" terminals the auto setup worked just fine.
Second, the overall ergonomics are very good to excellent. The only minor complaint that I have is that I need to switch monitor out between my flat panel TV and my video projector. You can do this with one button only on the front panel of the receiver. To do it through the remote you have to first engage the monitor button, and then use the left or right arrows to scroll through the choices (Note: In case you are wondering why I don't leave both Monitor Out HDMI terminals on at the same time, this does not work with my setup; Not the fault of the DTR 70.1, this didn't work as well with my old Yamaha 3900.)
More to come...