I run M22's for surround and love them for this job. (Listen about 50-50 music-movies) I compared them with the QS4's and just found I liked the effect that the direct speaker gave me. Although I must say that when I move to a different house I will most likely try a pair of QS8's as surround due to the overwhelming amount of praise for these little speakers.
I think that my room size and setup had a lot to do with my prefering the 22's for surround. If I had the cash I would love to try 60's in the back as I loved the extra performance of the 60's as mains in my system compared with the 22's that I first ran.
