We have LED's in my fj40 and i just bought some for her 4runner. gaterose is correct in saying that any of them that are of decent quality (lumen output and longevity) are not cheap. when i priced it out the swap to HID's vs LED's they were comparable.
I will say that I liked the light output of my old HID's probably more than the LED's, but if you are spending any time offroad i would go with the LED's. I found that the LED's take more abuse the the HID's.
If you go with the LED's you wont be sorry. Plus you are likely to be dead and gone before they fail.