the difference between the cable's will be the materials
some come with gold plated connecters, others come with shielded and others come with both
i would suggest you see which is shielde with the gold plated something like this
http://www.play.com/Games/PlayStatio...3/Product.html
i have this HDMI cable on my ps3 and there great i would recomene one like this to any one
EDIT - like atomic tofu said about price, try looking for one cheep that dose the things, i got these on play for £15 in a sale