Like everyone else, I have no alternate suggestion for the room set up as it is - but can you re-arrange the beds? Try moving one bed 90 degrees up along the RH side and moving the second down into that same corner to form an "L", if you can. This would free up the wall on the LH side so you could center the screen, seating and audio to create a much simpler "sweet spot". Other than bunk beds, I't all I got.