The M22's should work very nicely. Yeah, the M60's are better, but like you pointed out, they're $400 more expensive.

You should be very happy with the M22's.

As far as the rear channels go, I'd go with the QS4's or M2i's, rather than the M3ti. The QS4's will of course disperse the sound better, but if you want a direct radiating rear, the M2i will sonically match the M22's better than the M3ti's.