From the looks of it, LED is more expensive, but less things to go wrong, blow out, less energy used.
I don't buy the brightness or vivid color issues. These are backlight solutions and hava nothing to do with the actual LCD part. Color would only be better in one if the screen was manufactured by someone else. Ditto with brightness. Its all up to the quality of diffuser and the brightness of the lamp used. Both can burn your eyes out if the manufacturer wanted to, the question really is, is it set that high? Unfortunatly screen brightness changes from screen model to screen model.