I have the M3's
I've heard the M22's
IMO it comes down to personal taste, because those two speakers are very nice. If you like the laid back warmer sound go M3, if ya like the sound more up front, possible better detail in the upper midrange go M22.
Regaurdless of what you've heard, unless you are one that doesn't much care about bass, neither of these have enough (for me) by themselves. That said, sometimes when I am in the mood I do like to listen to the M3's by themselves, otherwise always with the sub on.
