My room sucks also, but it's sucking a lot less since I've been working on room treatments. I would also suggest the GIK corner traps and panels in place of your foam treatments. You need to be willing to experiment with placement of the different panels. Acoustical Solutions has some real nice looking diffusion panels that don't look like ugly like most diffusors. They look like a normal absorptive panel.
Do you have a radio shack meter and either a Rives test disc (best) or Stereophile test cd? If not, purchase them a make the measurements while seated in your chair. Post the frequency numbers where you have the greatest deviations from flat. This would help identify what areas need what.
From your photos, I would say none of the treatments address bass issues and it looks overdamped which would dry up the mids and highs.
Do you have a radio shack meter and either a Rives test disc (best) or Stereophile test cd? If not, purchase them a make the measurements while seated in your chair. Post the frequency numbers where you have the greatest deviations from flat. This would help identify what areas need what.
From your photos, I would say none of the treatments address bass issues and it looks overdamped which would dry up the mids and highs.