I have a Denon 3802 and it has seperate Amps for each channel. I am running a 7.1 and it sounds great.

6.1 or 7.1? In a small room I would suspect a 6.1 would sound as good as a 7.1. As you room size increases the better the 2nd rear would sound.

I'm running:
M60 Mains
VP150 Center
QS8 Surrounds
JBL N24 Back Surrounds
SVS PCI 25/31 Sub