Hi Rich!
Glad to hear you decided to try the M3s and that there wasen't too much of a budget problem.
I have not heard the M2s or M22s so I have nothing to compare to, but my understanding is that the M3s don't sound all that horribly different! so you(hopefully)won't find a major, disturbing, variation!!
Seriously though...
The M3s should prove to be an ideal "office" speaker and give you really good tunes at a reasonable price!!
We'll be looking foreward to hearing your thoughts on them by Friday evening!!
Rich.