DL,

If you're looking for a small center channel to match your M22's and/or on a tight budget, the new M2i is a good bet. Very happy with mine in my medium-sized (15' x 25') home theater room. Preferred it over the vp100.

If you're looking for a large center channel to match your M22's, one capable of good dispersion and high volume output, the vp150 is the way to go.

Good luck!

-alan