At Tech DC, we regularly set up home theater systems for people. We rely on Monoprice for all our cables. They are great quality and only a fraction the cost of cables from big box and other retail stores.
Local retail stores try to sell a HDMI video cable for $50 with every TV. See the HDMI cable selection at Monoprice showing equivalent cables for $10-20.
From a Virginia Target store:
From a Best Buy advertisement in the Washington Post: