I am part of a home theater forum, and everyone recommends getting any A/V cables from
http://www.monoprice.com. They have super cheap stuff, HDMI cables are around $5 for a 6ft length. I usually buy 2-3 at a time because I always end up needing more. Don't be fooled into thinking you need to buy Monster cables; especially with HDMI, because it is digital you don't need to worry about gauge, the signal either works or doesn't. I have about half a dozen of these "cheap" HDMI cables and that all work great. I also buy all my speaker cable from them as well.