M22+ sub is nearly equivalent to M80. M80+sub is even better still. Get the M22's and subs, the 175 should be good enough for music or get the EP400 it is an amazing little sub with great musical qualities, after playing with one a few years back I still want to get one.

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