Actually Reuben - It just occurred to me after my last post that you might be setting a multi-channel theater system versus 2-channel stereo only for music. If that's the case then my advice above probably won't work if you're doing a 5.1, 7.1, 9.1, etc. If the latter is the case, you're going to want to orient the listening room lengthwise so you have room for your side and rear surrounds with your listening position roughly in the center of the room.
Greg
Greg