i got my 30ft htmi for my projector from
www.monoprice.com
it was one of their "best" cables for less thern 25 shipped. reason i got the thicker gauge was because of the long run but for short runs i dont spend over 5-10 for a cable.
I always feel sorry for the people in best buy or other stores with those $75-100+ 3meter Monster cables in their hands