@sarge: While there is no doubt that OLED screen is the best screen currently available in the market but I do still enjoy my old Samsung Plasma TV. It was one of the last Plasma models that Samsung released and the picture quality of it after properly tuned easily beats most LED TVs that cost several times more than its price. But one word of caution... If you are really going to enjoy Plasma or OLED TV then you have to use it for the application where it performs the best i.e full screen movies or any such application. Do not use it for watching regular TV channels or applications which don't fill the screen or have static logos in the screen. In this way you would not have to worry about image retention or any issues generated out of screen burning. So if you are able to provide that isolation I would suggest you to buy a used Plasma than a new LED TV. You have to just look for a well maintained used Plasma TV and get it for a fraction of its original price....
Thanks