In our new home, we are building a theater...it is 11'x 21'. I have spent the past few nights reading many "forum" threads, your insights are invaluable! Is there a resonable location to mount the projector supports and electrical without knowing the exact projector I will purchase; Sony, Sharp, Yamaha...etc? We would like the screen to be about 8' wide. I thank you in advance for any reply. Newbie, Jim.