If you're buying HDMI cables, get whatever is cheapest. It's not like in the analog days when cables made a difference. It's digital - it's either on, or it's not. Get the cheapest HDMI cable you can find.
Technology exists to display 3D images without the use of glasses (it'll be rolled out to US consumers soon once they improve the technology to not require sitting so close to the TV -
http://247wallst.com/2010/10/05/a-ne...ithout-buyers/), so it's good you opted against a 3D set that requires glasses now. Those will be obsolete in no time.