I just purchased a Pair of B&W DM603-S3's. Would I notice a differance when Bi-wiring them to my Denon AVR-1803 Receiver, currently wired with QED79 speaker cable. If its really worth the upgrade what would be a good, but cheap Bi wire cable. I am using a Toshiba SD-510 for music playback, connected via a fibre optic cable (please no comments on using a Coax, tried it but coudn't notice a differance). Thanks for any help.