If budget is your concern, check out these
Behringer A500 amps. This is a 2 channel amp that can be bridged into 1x500 watts into 8 ohms. Take that down to 4 ohms and you might be able to achieve liftoff with the M80s.
For $400, you can have a pair of them and experiment with more power than you ever could reasonably need (or maybe even want!). A notable shortcoming is that these do not have a power trigger to come on with your receiver, so it either stays on all the time or you get an external power sensor (~$30) to fire up the amp when the receiver turns on.
The price on these undoubtedly seems too good to be true, however, I've done a fair amount of reading on them and the reviews really are good on the average. Also, if you buy from the place I linked to, there is a 30-day money back return policy so you can test the difference with/without them yourself and send them back if it doesn't pay the dividends you're expecting.
If you end up trying the amp out, I know we'd all be interested to hear your impressions.
Jason
