Seating dilemma for lounge/cinema room?

As there's no imminent chance of winning the lottery and moving to a house with a dedicated cinema room, I'm trying to convince Mrs C that we should change our living room around, so that instead of being in a corner, our tv and projector will be flat against the window end, with speakers firing down the room. (room is about 4m window side x 5m long)

Here's a slightly old pic of my system in the corner...

http://www.whathifi.com/forum/your-system/bw-cm8

Facing the corner I have two settees at right angles to each other, and each at 45 degrees to screen.

However, if we move the screen in front of the window, then one of the settees will be at right angles to the screen, and Mrs C thinks this will be impractical and uncomfortable for the five cobalt clan together - to watch screen some of us will have to look sideways, or sit sideways and have no back support.

(I'll try and sort a room plan to show as a picture.)

Has anyone else had this dilemma, and any solutions most welcome?