I don't know any sites but you may be able to find some using your favourite browser. There is not much inside current TV's, maybe five or six modules, most of which would be replaced if there was a failure.
When buying look for the features you need, e.g., number of hdmi ports, screen size, exterior appearance, extent of user controls for picture adjustment. You will likely need to spend some time deciding between plasma, LCD, LED, and 3D. Everyone has a different opinion, so do not go asking which is better. There are enough posting on the web for you to research and come to your own conclusions.
Then match your price point with a name brand and look for reviews. The CNET site usually may have a similar model with their comments.