I used to use m22's as my surrounds. And I defended that choice because I sometimes listen to multi-channel SACD's, and the M22's are more 'proper' for that sort of thing.

Then I broke down and bought QS8's. Unsurprisingly, they're considerably better for movies than the M22's. But to my surprise, I also prefer them for multichannel music.

Stick with the 4 QS8's. They are *amazing* speakers.

M80v2 | VP150v2 | QS8v2
SVS Pci+ 20-39
Emotiva UMC-1 & LPA-1
M22ti + T-Amp, in the Office