Lose the paneling. I'm not saying this because paneling went out in the 70's...acoustically it stinks. Seriously, paneling does nothing but vibrate. If it is installed over drywall or plaster, it can be nailed like mad or glued to eliminate any resonance but that may be too permanent. Most paneling acts like a giant bass diaphragm.
Also, the Revel and Levenson gear are extremely revealing. With sound resonating off the paneling, your system is probably brighter than need be.
Last, your TV is really low isn't it? Do you sit on the floor? I always thought that there was some correlation between tweeter height and the 2/3 point on the tv height?
