I ran first gen LED bulbs a couple years ago in my NA. A year later, one of them started to flicker and eventually died so I reverted back to HID. I currently use HID in both low beam and fog light of my SRT6. I have since gone thru different setups over the years, over a variety of vehicles and I can say, you get what you pay for!
I don't totally dismiss LED just yet! This video answers many questions on LED application and their evolution. My guess is in a couple years time, we will have more reliable, efficient and affordable LED's