I guess it depends on what you are looking for. The M40 will get you excellent bass response but I wouldn't expect it to have a "larger" sound than the M22s.

Hate to say it but for you the next step up from M22s probably *is* M60s.

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