I'm just throwing this out there, but as far as I can remember I've never been in a movie theater or opera house/theater that's had vaulted ceilings. Of course their ceilings are very, very high, but not vaulted. Makes me wonder if a level ceiling is possibly more desirable for sound?

My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD