I would then suggest a medium gray. You may wish to change your curtains and bedding to black or dark grey (as you can use them as black out curtains. I would also add a large black carpet that will help absorb echoes from the room with your sound system.You may wish to center the bed underneath the window

Lots of info available on forums dedicated to AV. Try a google search and you will find reviews.

Installing curtain rods at the ceiling is a great way to add height to a space, but the drapes will cost a bit more because they will have to be longer. You might get a better picture quality if you installed a projection screen over one of the windows which could be raised out of the way when not in use.

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