I am currently using a quad shielded, copper core, RG-6 cable with F connector to RCA adapters on each end. I seems to work just fine. I am wondering about upgrading that cable but wonder if I am going to hear a difference. I've looked at Bettercables but a cable from them will cost me over $200. This cable is used to send DD and DTS soundtrack signals from my DVD and HD STB units. Any suggestions... or just stay pat?