Have you seen
THIS THREAD at AVS forums?
Basicly, people are reporting that they are getting very very good results with using PRO amps, like the Crown 402 and others.
Killer WPC, Stable down to 1 or 2 Ohms, lots of headroom.
You could BI-AMP your center, Front LEFT and RIGHT speakers, and power two Side and two rear center speakers with 5 amps, costing about 250 each, or around 1250 plus shipping.
Not too shabby!
Just a thought.