My feeling based on reports here and having heard the warmth the 6 1/2 driver adds in the M60 is that the M3 is a nicer/fuller sound than the M22s and the 5 1/4 drivers detailed sound. I guess you need to 'hook up' with Robb.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70