Thx Gonk
I noticed on one of the links that you supplied that another person noticed a drop of about 4 notches on the volume (e.g. 50 on 5.1 Direct = 46 on CD digital). So all is well.
Maybe the 770 would be a good choice. I currently have another reciever running my sub (DVC-using 2 channels). I could run all my speakers and sub with one amp! Bonus would be that I would be in a great position for another upgrade!!!