St_Pat, the M3s sound was great in a 14x14 spare bedroom. They lost out to some MA Bronze 2s (a decision which I have second guessed frequently) for a few reasons:
-with no sub, the deeper bass of the MAs was a big plus
-I ordered the M3s in Beech and, IMO, they were hideous.
-I didn't think the slightly chesty mids of the MA B2s would bother me.
-I already had M60s, VP150, and QS8s, and figured a little variety was in order.
Seriously though, the M3s are great and capable of filling spaces much larger than your 10x10 room. Soften the reflective surfaces (so that the Axiom tweeter doesn't overpower your ears) and they are excellent.
I moved my M60s up into that 14x14 room and I'm stunned by how good they sound there. They're hooked up to an early 90s Onk CD player and sound better than they ever did with the newer Denon stuff I have downstairs.