We'll be moving soon, and I will have a room available for a listening room which is about 21 x 23 x 8 ... except along one wall the ceiling slopes down to about 4 feet at a 10:12 slope. The best orientation is either the mains or the seats at the end with the sloping ceiling, and the other at the opposite wall. Would you have an estimation of which would play the least havoc with reflections, and be easier to treat?