led tv will last longer and you can get them with out the background lighting effects. higher refresh framerate will be better for gaming and fastpaced movies or sports. and u should look in to the hookups asfaras hdmi ports audio in and outs.... i would suggest looking for a wifi capiable tv because it makes all the diffrence.
i bought a 47inch lcd lg tv off of craigslist for 400 bucks and a mac mini for 300 the next day. i like it that way because not only can i watch tv but i can play netflix stream movies/porn and play music. all for the price of a new tv. i would say dont worry about the fancy new shit go for a older cheaper modle just make sure it has a good framerate and you like the colors. sometv's have anti glare which i like