Holy Cats! I aqree with Janeb. With an entire wall of mirrors behind your system, coupled with the tile floors and the large glass coffee table, I'm suprised you're not driven out of the room. Maybe two pairs of Holograms would be the ticket. One pair behind the speakers about a foot away from the mirrors, and another pair behind and on either side of your listening chair would help. I know they transformed my room for the better.
Good luck ...
Good luck ...