I have a pair of 915.1's in a room just a little larger than yours. In my room they need to be at least 2-3 feet away from the rear wall. They image great front to back and side to side. If you like bass, anticipate buying a small sub. I listen to rock/jazz and like the extension a rather cheap sub provides. I put the sub dead in the middle of the 915.1's and it blends very well, allowing the 915.1's to retain their fast/crisp detailed sound.