Alex,
As I think I mentioned in your other post. The Q's will do a better job in the "surround" category as they are designed to "surround" you or "envelope" you in the sound. A direct radiating speaker (bookshelf design like the W's) will not do as good of a job in this category. Will they sound good, yes, but Q's will be better for that application.
I'm not trying to talk you out of W's, just trying to help. Do you also realize that the W's are going to require you to cut a rectangular hole in your walls to conceil part of the speaker? The Q's mount right on the wall.
Also, you normally want the surrounds about 2ft above your ears or higher.
Also, do you realize the surrounds go to the left/right of you? The rear channels for 7.1 go behind you.
