Just thought a before and after was appropriate!
Before
After
Definitely a better/cleaner look! I'm sure the sound is better as it pans across in a movie.
I'd probably look for something to go on either side of the center - maybe display a couple of classic album covers or a bust of Beethoven (like Linus has) if you want a music theme. I'd personally probably go with a bust of Bach and the LP cover from Yes - Tales from Topographic Oceans (with Roger Dean Cover art). But you've got a nice, clean mono-chromatic look and the TFT album might clash, if so, maybe do an M.C Escher coffee table book. Or, maybe that is a task best left to your wife (and give her some ownership of the room)!
Just food for thought and living vicariously through you because my room is far too cluttered to attempt to display anything, it'd just blend in.
Nice set-up!!!