My babies, for which my wife claims no ownership:
Infinity IL60's w/12" sub in each
Infinity IL36 center
Infinity IL30 surrounds
Infinity OWS (on wall speakers) rears (using one of the 770 channels to drive the two back spkrs)
DBX 15" sealed passive sub(using of the the 770 channels to drive this puppy)

My 770 is loaded, but performs flawlessly.