Dunno if this will help, but, when I had to make this decision, I went with the M2's so that I could get the QS8's. I just didn't like the idea of getting smaller drivers (even for the rears).

Granted, I'm probably 90/10 hometheater/music, but, that is what I did.

I did go with the VP150 as well.

I'm liking it. I got a HSU STF3 to fill in the low end where the M2's don't go.