I don't, my first job was working with TVs, also I still make sure to keep up with the CES, and all the new TVs and what not.. Set up an LED and a Plasma side by side, make sure their the same brand with the same hertz, and pixels, adjust the setting to exactly the same, use the same cords, the same system, everything matching exactly the same, and LEDs are much better.. And yes I've put this to the test..