Hi:
Hey I have the M80's in a room that's 22' long by 20' wide and I think they're great. I sit approx 15 feet back. I power them with a HK avr-7200. I'm personally glad I got the 80's as I know I would have always wondered. Don't worry about what other people think, people on this forum always push people toward the m60's if you want the m80's go for it. Either way you won't be disappointed, and don't overlook the factory outlet. I got mine from there and saved 10% and I'm still looking for the supposed defect. Good luck!!!