HDMI cables, especially at brick and mortar stores, are painfully over priced. Generic cables work just as well and cost a fraction of the price.
At PC Magazine they purchased everything from premium Monster brand HDMI cables ($120) to bargain basement $2 cables and found that there was no difference between the two. This is unsurprising if you know that HDMI cables carry a digital signal.
Unlike analog signals that can degrade over distance or poor connection but still provide a picture (however fuzzy or poor), digital signals are either on or off. Either your HDMI cable gives you a perfect digital picture or it gives you nothing.
Hit up the link below to read the details of their experiment or just head over to Monoprice.com and score some crazy cheap but just as effective cables.