Steve,welcome, many of us on the board use amps and are very happy with the results, I guess I'm in the more power is always better group You have a pretty large room and Imho if you are going to drive (4) M80's, while the 7125 would certainly do the job, I think you would be happier with the results from the 7700.

A computer once beat me at chess, but it was no match for me at kick boxing.