After trying some mediocre HDMI cables, I purchased a Liberty DigitaLinx cable. The improvement is noticeable and the price is right. They come in 1 and 2M lengths and are 1.3 compliant.
As a side note: Anyone looking for a compact right-angle HDMI (Male/Female) adapter I can highly recommend the HDMI-MF-90 and the HDMI-MF-270 or HDMI-MF-90(R), reverse 90 degrees. They are available through Stevenson Technical Services, Inc. http://www.stsi.net