I redid my entire entertainment center (optical cables, HDMI cables, component cables, speaker wire, etc.) using monoprice.com cables. High quality stuff, works perfectly. Got about 15 cables for less than $50 total.
6 foot, black, category 2 certified HDMI: $3.56.
Remember, friends don't let friends buy Monster. 
You might check your Panasonic and make sure there is a setting to interpret HDMI correctly from the U-Verse box (see my calibration post for details). If your Panasonic does not have that adjustment, you should use component cables instead for a better picture.
6 foot, black, component 3-RCA: $2.38.
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*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.