How big is your listening room ? There seems to be a general feeling that the M22s can fill a big room a bit better than the M2s, and presumably the same applies for M22 vs M3s. The difference will be fairly small, but if your room is real big then waiting for the M22s might be worth it...

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8