I want to connect my DVD player to my Panny XR25 A/V Receiver via coaxial cable. I'm a bit confused. What do I need to buy? From what I've read, some people recommend regular RCA cable (audio or video), others digital coaxial cable, some specify digital audio coaxial cable. I went to radio shack and the salesperson suggested their PCM digital audio cable which doesn't seem right to me. Cost of this cable was 8.99 for three feet and 13.99 for 6 feet. Would appreciate advice and recommendations. Thanks a lot.