At the rate technology is changing I wouldn't feel inclined to spend the extra $$$ for LED backlighting,
unless the picture is demonstrably better. Or if you're a granola chewin' tree-hugger and appreciate the lesser power consumption and "greener" materials that the LED backlighting has.
LED backlit TVs will come down in price. In fact, I suspect they are cheaper to produce than CCFL backlit screens, and the higher prices are a result of preying on people's tendancy to always want the next new thing.
Personally, I'm hoping my plasma lasts until OLED tvs are here and affordable