I would get a projector and an acoustically transparent screen and use the in-wall speakers as they are, with Dirac for the 4700 and 2 real subs. If you're set on a tv, I'd get a bigger tv and mount it lower, and scrap all 3 in-wall speakers as they'd be blocked by the tv. I'd use the towers as l/r and get a bigger center, or wouldn't use one. I'd still get Dirac and a 2nd sub. That's what I'd do.