I am over the moon with the Sinotec I got on special about a year ago. In it's price-class it had the best image quality, and it came with the ridiculous 5 year guarantee. The TV is on most of the day, and it's still going strong after a year. I heard a rumour that they use Samsung panels, but I can't confirm this by a long shot, and I actually preferred the picture on the Sinotec, but this really could have been the settings, and not the screen itself.
If I could do it again, I would get the same TV. I never use full HD, the Xbox 360 looks amazing on it at 720p, and I have a large dvd collection that upscales very nicely. The standard dstv signal also looks better than I've seen on the bigger screens.