LR, Ive had a 52" Sony Bravia DLP for 2 years now and had one bulb change, still sharp as ever and no screen burn. I love the thing, the colors etc are outstanding. The only bad issue I have is the sound is too low, I guess it was designed to be used with a surround system.
All in all though, best tv I have ever owned. (You might want to look at the HP DLP too)