I agree with JohnK. The surrounds aren't supposed to call attention to themselves. To test the QS8s and make sure that they are capable of "umph" -- which they are -- put your receiver in all-channel stereo mode and crank it up.

Also, one movie that sticks out as a great surround "umph" tester is the first Matrix film, particularly the lobby shooting spree scene. You should hear bullet casings rattling all over the place and bullets whizzing by constantly.