Buckeye ... man it is very nice the way that back wall just fades away whenever the lights are dimmed down! I've tried all of the panels but I believe due to the window on the left and the media storage on the right I am getting a lot of deflection of sound and just couldn't tell much different with them in place ... the bass traps on the other hand, I can tell quite a difference.
FGF ... The floor to ceiling bass traps are the GIK Tri-Traps, I had to cut and modify a pair to make them fit on top of each other. As mentioned above I did try and still have four panels but just couldn't tell much of a difference, with either my ears or the graph.
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Here's just one more picture I'd like to share (then I'll quit!). This is the view from the driver's seat, David Gilmour with his Fender in the Pink Floyd's 'P.U.L.S.E.' DVD ... the bass on 'Learning To Fly' and 'Sorrow' is phenomenal!