To my knowledge, LED headlights are only options on high end cars like Audi's (A6 and R8), but I think the new Prius even has an option for LED headlights. I'm guessing aftermarket LED headlights will follow but not for a few years down the road. HID's are the way to go right now.
I just did a HID retro (finished it up last night) and I have to say I'm more than pleased with the outcome. pics to come later...