I took some of your sugestions for upgrades, I moved the center chanel to the floor and added more power to the front speakers. Now have a much better 2 chanel sound and better sound from the center chanel. Thanks for the ideas.
I think your off to a great start. However, I would suggest considering a new amp to be highest priority. The 803's are power hungry and they will "wake up" alot if you get an amp with a little more current. Personally I would recomend investing in a stereo or monoblock amp for the 803's. At any rate your money may be better spent on new amps, as opposed to a new source.