The set-up I am currently running is M50s for mains and an M3(vertical/inverted) for center, and am very happy with it.

If a person prefered the sound of the M50s, that would be one way to go. The M3 is a perfect match for the sound of the M50 and has no problem acting as center in my 16x27 room. And the "B" word never gets said!

The only downside is that M3 is so much less expensive than the VP150 that you would miss out on all the fun of spending all that extra money