What he said. More energy efficient, and allegedly a longer service life for the LED's.
We got a Vizio 32" for Christmas, and I find that the standard channels look about the same, if not a little better, than my old 25" set (don't recall the brand), but not as good as my Sony flat screen (not flat panel). On the HD channels, the picture is great. Haven't popped for teh Blue Ray yet. Any suggestions?