Hi all,

I currently run a 5.1 setup consisting of the following:
M60 fronts
M40 side surrounds
VP100 center
HSU VTF-MKII
All powered by an MPS-2 via a Yamaha RX-V1400.

The setup sounds awesome but want to move up to a 7.1 setup. I enjoy listening to 7CH setreo a lot so the question I have is the following:

Would I be better off getting something like the M3's for the back surrounds since they match the other speakers(7CH stereo) or moving the M40's to the back and mounting QS8's on the side? I don't have much space on the back and the advantage of getting M3's would be that I can place them on a shelf on the back wall. What about M22 for the rears. I'm open to options.
Thanks in advance!