I've got M80's with a VP150 center, and although thre is a timbre mis-match, I'm not unhappy with it. I did have the opportunity to run my in-wall M2's with the VP150 in my HT and there was little to no timbre difference - much more seamless across the front, and with the sub sounded great at moderate to high volume levels. At very high volume the M2's just couldn't replace the M80's. But then again, they're not supposed to be able to. From an aesthetic point of view, I'd think that M22's as L/R and VP150 for a center would be nice to look at.

Scott

My HT