My avatar pick is my car, 605 whp/3120 lbs, 216 mph top speed, 9.8 quarter, 2.8 0-60, and can hit 2 g turns. My roads suck and I can only drive it four months each year. I enjoy the shit out of it every time I drive it.

I have M80's in a 12'x16' room with 200 wpc amps. Love them.

The question was "are M80s too big".

My answer - nope.

If the OP was starting with a blank sheet and designing/ specifying a totally new system, I'd probably go a different route.

Life is short, live it while you can.