LED is the newer technology currently. if you see with tvs, LED is expensive as its newest + better. Well i havent seen a pure LED monitor yet or 27inch less tv , but ive seen a few backlight LEDs (me having a E2472HD iiyama 24inch led backlight, lcd)
tbh for LED backlight , it depends on what your using it for, and if your willing to pay the bit extra.
And do you like your monitor?
hmmm yes i think i do. But god led backlight is quite good. i still need to adjust my levels , havent got around to do it yet (im lazy).
You could go to somewhere like Currys or PCworld and see what the difference between the types of monitor look like.