http://www.newegg.com

the dollar per foot is a bit of an exaggeration, but really, I have three 6ft cables and I don't think I paid more than 10 bucks each.

You do have to realize, some of the ludicrously cheap Hong-Kong discount brands CAN be pretty crappy... if the gauge of the wire they use is too small, it may not be able to transmit a full 1080p signal with full surround-sound without a degradation in quality. I've seen some cables no thicker than an old game controller cord, and I wouldn't waste my time with those, but the ones I picked up are substantially thicker and have better insulation, and I've never had any issues