EDIT: (The room ended up sounding so good it was time for a more fitting speaker, the new Sopra 3's have been in place for a week) Bought a new place and finally have a dedicated room for my gear instead of integrating it into my living room. While the old space was visually appealing, it had several drawbacks relating to the wall/stair configuration. The new space is nearly square (bummer) measuring at 20.3 x 20' x 8', but has turned out quite well. The best part is the floor is constructed of 2x4's directly on a concrete slab, so it's very stable. Judicious use of GIK room treatments has tamed the beast. The soundstage is much larger than the old place, and the detail/depth is over the top for me. It's the best sounding room I've ever had. I just can't seem to get enough time in there.
If I am interpreting this picture correctly, there is a table with a lot of stuff on it between the listening position and the speakers. This would make anything like correct stereo perception out of the question. You should remove the table and all the junk on it and have nothing between you and the speakers.
you should try the Townsend podiums underneath the speakers I know they're expensive but it'll be like changing your whole system it's that much better, will stop all the vibrations of the speakers and the Earth will open them up quite a bit.
The rings on the tubes are dampers from Herbies. I run them on the tubes in the Herron as well. They are supposed to limit vibrations from reaching the signal tubes. I can't hear any difference with them installed or removed, but I figure trying to keep things from vibrating is a good thing. Some say they can effect the sound negatively, but this hasn't been my personal experience.