I'll pop in one last time on the M50/M60 issue as relates to what center to think about.

Here's where the "Ifs'" come in.

"If" perhaps you do try the M50s, and "If" perhaps you actually like them, then my suggestion would be to strongly consider using my old favorite, the M3, as center.

I've not heard any of the VP series with either the M3s or the M50s so I can't comment on how they sound with them, but I can say that the M3/M50 combination is as close as you can get!

And the price is right!