Unless you plan to build your own, a good company to get room treatments from is GIK acoustics. They offer a free online room analysis. Room treatment can often have a greater effect than swapping out speakers or components. Best of luck!
I can attest to that! Every time we add a room treatment I have rerun Audyssey, and been shocked as to how much the sound changed... From top to bottom. Bryan will most likely see the thread and respond to you or you can call and ask for Bryan Pape (I hope I spelled his last name correctly), and he can help you out.