I believe I read somewhere (sound & vision?)that a digital coxial cable is basically the same as a video rca cable. Is this true? If so, has anyone every used it, and how go was the sound. My reason for asking is that I am going to have to make a long run from my HD cable box to my reciever, and I know that I can get rca video cables a lot cheaper that digital coxial in any lenght.