I guess I have to cast another vote for "VP100 and QS4 would be just fine". I haven't heard any QS4 vs. QS8 comparisons but -- other than the way Axiom combines them in Epic systems -- all the indications are that QS4 and QS8 sound pretty much the same. I would call Axiom on this one.
I went with QS8s mostly to match driver sizes with the M2 and M60, which isn't an option with M50s anyways. I bet Axiom would sell a whole lot of centers with 2x6.5" drivers if they offered such a product, even if there was no good technical reason for making one
I'm still trying to figure out how to get my ears onto some M50s... based on what I have owned and liked over the years I think I might slightly prefer M50s over 60s myself. I'm going to borrow some M3s from a friend at work and have a listen.
