My room is 12 x 14 and I've had it set-up every way possible, finally settling on diagonal. Best performance my system has ever given me. Front speakers are a couple of feet out from walls, and probably 4-5 feet from the front corner, which allows for a very deep and resolved soundstage, with loveseat a couple of feet from the back corner. Only downside is a slightly narrow soundstage due to limitations of speaker positioning because of furnishings.
Give it a try. I think you may be surprised how well it can work.
Give it a try. I think you may be surprised how well it can work.