How big is your TV?

And don't fall for the ultra HD either (4K)unless you know what the deal is with those.
Almost no channels are ultra HD which is 4x1080P and a couple hundred extra dollars.

Look for something in the minimum 240 hertz refresh rate for non blurry action.
Some of the "smart" TV's have a built in browser and some don't and it's a nice feature to have, because other wise you can't use it like an internet connected computer.
You will have Netflix, Hulu, You Tube, and stuff like that built in, but you wouldn't be able to use it for Craigslist, FABO, or any other site on the internet that there isn't a specific app for.

I see redfish told you about the UHD. :D