Ditto to all of the responses. I own both, and they're both outstanding speakers. My M22's are in my main system with VP150, QS8's and SVS sub. My M3's are in my bedroom with a cheap Velodyne sub.

The M22's win out for me in my main system, even though the M3's sound great also. But the M22's just blend really well with a strong sub like an SVS or HSU. M3's do have better bass on their own than the M22's. You can't go wrong with either depending on what you are looking for.