This is weird. There was a thread started just a few days ago by someone here building a new theater. Their design was to be an open plan with curtains or such to close off from the rest of the room. I had a referenced a similar layout that I saw recently in a magazine and wanted to note which one. Unfortunately my search is turning up empty. So, if this is you the mag is Robb Report Home Theater & Design April/May 2003, p.66. Really nicely done theater, albeit with what I assume to be a number of acoustic challenges given its open plan.