Curious if anyone can give me some input on this ..

I just placed an order for two m50's, 2 qs4's, and a vp100. I have these coupled with an svs sub through a panasonic xr55 receiver. Anyway, I've done a bit of reading on the mains and almost without fail people seem to feel the m60's offer significantly improved sound over the m50's in terms of midrange and more balanced output. I called up Axiom to change my order, and they suggested I instead keep the m50's and upgrade to the vp150 center.

Help? The television is in the corner of the room; the room itself is fairly large and open, with the viewing area being something like 15*15 and a vaulted ceiling. From what I had read the VP100 and 150 more or less had the same sound minus their upper end, where as the m50/60 had a different sound. Axiom seems to not agree ..