First of all, is there any harm in using an RCA cable in place of a Coax cable for a digital connection? Reason I ask, is because I have a low end coax cable currently connected for my digital audio on my HDTV, but I have an extra upper end RCA cable that I would rather use, granted it would yield better performance. What would you guys do? Low end coax, or a single higher end RCA for the digital sound? Yeah yeah, let your ears be the judge, but I'm just curious what you all would do or recommend.