You can just get the standard cable, there is no real difference between the $3 Amazon.com cable and the $800 Best Buy cable (make sure you read the reviews on that one).
With digital-signals (unlike analog), lower-quality signals give you the same quality audio/video.
HDMI cables only carry digital signals, so using ultra-high quality titanium-shielded solid-gold cables is no longer necessary to get good-quality audio/video.