We have a Pioneer plasma tv that we got 5 years ago. We haven't had any problems with burn-in and it's still going strong. The minute we saw it in the store, we knew we had to have it, the picture was that good.
We also have two Samsung LEDs. We have two because hubby bought one for his apartment where he works. After just over a year (of course it was after the warranty ran out) the screen went black and the idiots at Best Buy said it would cost more to repair than to just buy a new one. For whatever reason, hubby bought another Samsung. On a whim, he took the first tv to a regular tv repair place just to see what they would say. They replaced a part and fixed it for $100.