I have a Rotel RB 1080 with 330 watts @ 4 ohm. I think it can handle the M80s .
I know, it was kinda a rhetorical question (Nice amp!) But that is kind of the focus of my point. A couple of the posters here that say it's okay have beefier amps driving the M80's. Nothing wrong with that, I want to do the same...
My room is 2600 ft3, but that has no impact on the amp clipping.