Hey folks, I'm looking to purchase some cables for my Xbox 360 and possibly a future PS3. What specifications in cables are good to look for in regards to HDMI and optical audio? It looks like I could buy two 6' optical audio cables off of Ebay for about $10USD after shipping, but considering they sell for $50 at a brick and mortar store for only one, I'm concerned they may deliver a noticeably less quality experience. The same is true with HDMI. I'm not an audiophile, nor am I concerned with a philosophical (but non-noticeable) improvement in picture quality on my 1080i TV over component, so what are the things I should be looking for that will make a REAL WORLD difference to my gaming experience? Thanks!