You have personal choices such as antiglare or not, if you like the color or not and so on. And you didn't tell much about the PC and it's video output capability. For example those netbooks rarely play video on the big screen.
Try this. Go shopping, find models you like, in the price you like (it's a big world so prices are not possible to meet in the forum) and then short list a few for the members to comment on.
Extended warranties are a good idea. Costco was great about that.
I would like to buy a tv for a computer monitor in order to save both space and money (it would also be the tv.) What is the best size for using both pc-gaming, general use, xbox gaming, and Kinect gaming. viewing distance for pc use would be around 4 feet.