I am sorry I did not read all of your posts thoroughly. Since you have the luxury of building the room, by all means take advanatge of the abilitiy to make the side walls and ceiling non-parallel. This will effedctively kill any standing waves in the room and largely eliminate nulls and voids in the rooms frequency response. If you have the money for it ($2k-$5k), I would *highly recoommend you employ the services of a firm such as Rives Audio. They are *experts* in such things and will give you invaluable information on the proper design and construction of a terrififc looking and sounding HT room.
Man, I wish I was in your shoes, you are one lucky man!!!
-RW-
Man, I wish I was in your shoes, you are one lucky man!!!
-RW-