Ok, good to know that I should not have a problem powering them and that they will work good with behind placement. While Axiom recommended the QS8’s I think that the QS4’s may be fine, because I just realized that while about half of my room is 11 feet wide, the rear half where the surrounds will be if only around 7 feet wide (you can see this in the diagram. That does not leave a good amount of separation between them, so I am thinking that the QS4’s will work really well. I think I will give Axiom another e-mail and see if they still recommend the QS8’s, and again thanks for the advice.