I've got the whole 5.1 thing down, and where the 5 channels are, and on a 7.1 system, I gather that the two new channels are "side" channels. Now here is my question: I don't want to have side speakers sitting on stands in my room, and I can't cut into the walls, because there is a door in the middle of the room on one of the sides. I could however, put some "in ceiling" speakers in, in the middle of the room on both sides. Is 7.1 meant to have the speakers on the sides, or would it sound acceptable to have them in the ceiling? i.e. would sounds sound very out of place if they were in the ceiling? Thanks !