I am going to be getting M22s for my front speakers and am wondering if anyone can tell me if I can use my B&W 200's for the surround speakers. They are rated 50W RMS, Max 100W, at 4 ohms.

I don't see why you couldn't. I assume your receiver/amp is capable of driving a 4 Ohm speaker, since you already own them.

No reason you couldn;t.

They won't sound as good as QS8's, but they'll be better than nothing!

QS8s? Now you've got me drooling again.

Well, welcome to these boards... :-)