Just as a data point for you, I have M80's. I was originally driving them with an Outlaw Audio 1050, it's an integrated receiver rated at 65w X 5. Not knowing any better, I thought it sounded good. Then a co-worker let me borrow his 2 x 200W Threshold amp, what a HUGE difference. They sounded like totally different speakers. Much more bass, more punch, more detailed. So i just had to upgrade. The same co-worker (he is a very high end audiphile) suggested I get a used Aragon 4004, 2 x 200W. I picked one up for $600 on Audiogon and couldn't be happier. The oulaw still powers all the other channels, and the Aragon powers the M80's.
Outlaw makes a newer pre-amp the model 950 (it's not that new) maybe it will work for you?
