Thanks everyone for the advice. I've still got most of the 30 days to mull it over and make a decision about getting the M60s vs keeping the M22s. I'm leaning towards the M60s since my setup is music only. Problem is, I can't afford them yet . That's one benefit of the bookshelf / sub system - you can build it up incrementally.

I'll post updates as I figure out what to do (and possibly a comparison of M60s vs M22s, if I go that route). Good idea, Alan, on mounting to the wall as well as keeping them on stands, but the imaging and soundstage is really great about 8" off the wall - seems to degrade the closer they go.