Robert Harley's book "The Complete Guide To High-End Audio" recommends a formula with the hight being 1 the length of 1.9 and width of 1.7. If I were designing a room I would splay the walls maybe 2' smaller on the wall behind the speakers than the wall behind me. I have thought a big bow wall behind the listening possition as an effective and look cool. For sure the ceiling would slope, even if only a little was possible. I would look at areas for built in base traps. My new Audiogon friend "nicetom" recommended Everest's book "Sound Studio Construction on a Budget" as an excellant reference. I have seen other Everest books talked about here, that might be the best place to start. Good luck and have fun! J.D.
