After you decide on that new HDTV you will likely be hooking up additional equipment to it with an HDMI cable. Since you probably got a good deal on the TV and components why would you think twice about just adding the cable from the same store.
Stop right there.
Cables are often high profit items at your local electronics store. My suggestion is to look online for your cables. An excellent choice is MonoPrice.com.
Tom's Tech Tips 