I have to agree with everyone else. I've had my M2's for about 6 months now and am constantly astounded by their sound. I had all but quit listening to any music for several years until I got these and set up my home theater. Now I find myself listening to my old favorites all the time.
I have them paired up with a VP100, QS4's and a EP175 sub. Even in a rather large room, 20x18, they fill it nicely. And I can honestly say that I have never found the top limit on how loud they can play. The farthest I have turned my receiver (pioneer 912) up was a -8db and they never showed any signs of distortion and it was louder than what I could comfortly listen.