Ok, I know that the guys at Emotiva call me an amp whore, but have you thought about going with monoblocks? The new XPA-1's are simply
BEASTS
I've had a recent opportunity to have the Emotiva guys at my house with a bunch of gear. They brought all of the current and future two-channel amps they have. My favorite was the XPA-2. It has huge power headroom and really clean sound. The XPA-1 is supposed to be even more monsterous.
I'm still thinking about getting seven of the XPA-1's for my theater.