As the title says, my couch is against a back wall and my question is not so much where to put my rear speakers, but how to face them. They are Energy CB20 bookshelf speakers, on stands at ear level (no option to mount). They are (and can only go) 3 feet apart on each side. Should I face these speakers right at the listening area (90 degrees) or straight ahead toward the TV to help diffuse the sound, or somewhere in the middle (like the position the mains are in...with a tow in toward the listening area). Thanks.