As Rick said, go for a more capable receiver or seperates. There was a link kicking around for an amp that was able to take high level inputs(speaker output from a receiver) and amplify it for more power...hmmmm, where is it?
Anyway the best idea would be to get a new 7.1 capable receiver from Onkyo, Denon, H/K, NAD, Axiom sells Sherwood Newcastle because they will drive the M80s as well.
Many of us on the forum have been able to find deals for Denon's 3808. If you are in the States, you can get the 3808 from 6ave.com for $1099. You have to call them and request the AVSforums member special price to purchase it for this amount.
If you want to go the seperates route, Outlaw Audio, Emotiva are a couple of ID companies that sell good products for a reasonable price.
