Not to open this up again- but the new September PC World tests cables from five vendors with televisions with both digital and analog connections. The cables were from budget vendors cablewholesale.com, startech.com, and Monster Cable, and "boutique brands" AudioQuest and Kimber Cable.
($18-$300.)

The four pages of tests are summarized in the last paragraph, "Whether you hook up your TV via digital connections,analog connections, or both, you are unlikely to detect any difference in picture quality between a cable with a moderate price and a luxury brand. The only difference you're likely to notice is how the cable looks behind your TV."

It is my guess these results translate directly to audio gear also. Dont want to start a flame war, just information to share in case you are interected in looking at the article.

Chuck