Im not sure a cable is the issue. The cable I use is a Motorola Cable, which is said to be compatible with the higher resolutions, yet the picture sucks. According to the following link, All HDMI cables are the same:
Inside the HDMI cable scam - Technology & science - Tech and gadgets | NBC News
The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I'm just not close enough to get the job done."