At 2660 cu ft, I would suggest you look at the M22s as well. By all accounts they are a very clean, musical speaker and would be a great pair of speakers to anchor the rest of your system. That doesn't mean to say you shouldn't look at the M2s or M3s, but the 22s would certainly be my choice for your size room.
As it sounds you are on a bit of a budget, I would also suggest you consider buying through the Axiom Factory Outlet to save a few dollars on your purchase. Many of us have taken this route and found little or no blemishes on our speakers from the FO. The trade-off is, you will have to wait around 4 wks for delivery.
Good luck, and whatever you decide on...enjoy.
Oops, just read about not being able to get the 22s past the wife...then the M3s if you can't sway her!
Last edited by Adrian; 01/14/10 04:34 AM.