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The HDMI cable at Wal-Mart is a Phillips; as far as I know, a good cable.captain_video said:Perhaps, but probably only if you bought the HDTV from Walmart as well.
Cheap cables will give you poor results as a rule. High-priced esoteric cables won't necessarily buy you the Holy Grail either. Monster Cables are generally overpriced and overhyped for what you get. OEM cables are usually thrown in the box as an afterthought and should be considered throwaway items (literally). You can buy some excellent quality HDMI cables for well under $100 and probably much less. There are some good cable vendors listed over at the AVS Forums that sell quality products at reasonable prices.
According to everything else I have read, HDMI can be run for reasonably short lengths on just about any cable--say, up to 12 or 15 feet. Component cable is much more sensitive to cable quality.
Although I bought my HDTVs at CC, what is wrong with the Sony, Samsung, or Panasonic HDTVs that Wal-Mart sells? What difference does it make where you buy a leading brand?