I concur with mojo. The only reason to get a couple m2's would be to put one above and below the screen. Axiom is correct that a VP150 would outperform 2 M2's, simply because the VP150 has one more 5.25" driver than two M2's put together. I find the output of two M2s PLENTY enough for my room. If you can't make the M2 centres work, just go for the VP150, which many say is a pretty good speaker.
You can also try 2 M2s on their sides above and below your screen, with an opposite tweeter array. The M2 speaker is so small, i doubt anyone in their right mind would be able to tell which speaker has which tweeter on which side...
