There is no way the 770 can drive 300 watts
into 7 channels. That would be 2100 watts
assuming power supply could even hand it...

I bet four monoblocks for your surrounds
and bi-amping your front, center, and right,
speakers with the 770 would ROCK!
_________________________
Samsung 61in 1080p DLP
Denon 4306 ( pre/pro only ) / Toshiba HD-A1
Cinenova Grande ( 600W x 3 ) - Polk LSi15s, LSiC
Outlaw M2200s ( 300W x 2 ) - Polk LC265i x 2
Velodyne HGS-15X