I have a small listening area 10 x 12, and decided to use QS4's in the rear. Y also have a vp150 for the center and M60's for the front. I have an extra M22 that I thought I might use as a rear center. My couch backs up against the rear wall. My question is, is it worthwile to use the M22 in this type of set up and if I do, how do I best stuate the QS4's and the M22 for best affect. Thanks.