Check out this blog post about HDMI cables and the fantastic ripoffs involving them.
There’s nothing new about the ‘magic bean’ theory in audio. As an audio geek (but not a pathetic one), I’ve bought heavy-gauge, cheap hookup wire for years for speaker cable use. They sound great and work just as well as the $100/foot cables in any blind test. But at least there were measurable differences (perhaps not to your ear, but certainly to scientific instruments) between the cheap wire and some of the expensive cables.
Not so with HDMI cables. Their job is to move digital data. If they succeed, you hear sounds and see audio; if they fail, you hear and see nothing. There are no shades of gray.
Ever since I went to HDMI cables to connect components, I’ve bought the cheapest decent-quality cables I can find. They typically cost less than $10 and work exactly the same as the $120 cable Circuit City tried to sell me when I bought an HDTV there almost three years ago. But there’s still a whole industry of “high quality” HDMI cable manufacturers out there who promise you falsely that their cables make for better audio and video than cheap cables. But that’s not how things work in digital audio.