Hmm, might want to look at some new amps.
I've owned alot of Adcom grear in the past (including the 545-II amp), but the Outlaw 7125 made a big difference in the sound quaality.

I'm using the 7125 with the 990 and get very good surround effects with my speakers.
B&W 604 front, CC6S2 center, DS6 surround.
The DS6 surround is a bi-polar speaker, which produces a difused sound to simulate movie-theater type enviroment.
I'm keeping the sides (for now) but repalcing the fronts with B&W 804S and HTM3S.