The problem I see, is that the speakers you have are waaaaay overpowering that space. You do not need large towers in that close a proximity for surround duty. If I were you I would take out the side towers altogether (maybe place them in a secondary or bedroom system) then take the speakers behind the couch, place them on the side walls high up close to the ceiling. Then calibrate with a sound meter. The problem is having the rear speakers fire directly into your head defeats the entire purpose of having rear speakers and that is non directional spatial sound (something you aren't getting at all right now) Tis better to have an awesome 5.1 system then a mismanaged 7.1