I too say go for the VP150 and QS8's. As far as the M50's go. It depends on your taste in sound. Do you prefer clear, crisp - what some might call "forward" or "bright", or do you prefer more subdued, laid back sounding speakers? If you like all the details, and clarity, you'll want the M60's. If you prefer a more "laid back" sound, the M50's are for you.

I have the M60's and VP150 and LOVE them. My speaker search is finally over. I won't be upgrading these babies for a long, long time. Next on my list is a pair of QS8 surrounds.

Good luck with you new upgrade.