Wow, a 36'x39'room with a 20' high ceiling -- that's what I call a BIG listening room; actually more like a theater or auditorium. I think Duke is right about it being hard to accomplish your goals on your budget.
But a few things popped into my head, for what it's worth. 1) Maybe you could partition a corner of the room off with acoustic barriers and make it easier to accommodate a "normal" system. 2) Perhaps multiple speakers would be better than a stereo pair. 3) You might be better off checking this out with pro-sound people who actually install theater-type systems...
Good Luck!
But a few things popped into my head, for what it's worth. 1) Maybe you could partition a corner of the room off with acoustic barriers and make it easier to accommodate a "normal" system. 2) Perhaps multiple speakers would be better than a stereo pair. 3) You might be better off checking this out with pro-sound people who actually install theater-type systems...
Good Luck!