I have read that the VP100 is good but not quite the match in quality for the M22s. Is the VP150 significantly better? How about using another M22 for a center?

I know the VP centers are better sheilded, but are they made to sound a little different to deal with the effect of the TV on their sound (certian frequencies lowered?).

Any other things to think about in the choice of a center speaker?

M22s, QS4s, M2 center, Hsu stf-1.