Belgarath, you'll be very happy with the M22s. As already noted, they play really nicely with a sub. If and when you move up, the M22s make a great secondary system for a bedroom or as fill speakers, like you mentioned. My guess is hardly anyone here gets rid of their M22s when they upgrade.

I started out with nothing & I've still got most of it left
M60 VP160 QS8 EP350
M22 VP100
Algonquins