06-04-12: Tpreaves
Folks gave you some good advice on your other thread.
Yes, you already got the right advice on your other thread. Your Parasound/PSB combo is so much better than your upstream components they're just revealing those shortcomings.
First of all, ditch your cheap Blu-ray for an Oppo, whichever one you're willing to pay for. Second, don't expect great sound from your cable video feed, though a better AV pre/pro could help.
I don't know what you're using for cable, but electronics are all about signal transfer. Some entry level Transparent may be a good place to start there.