I'm running HIDs on foglights. Their Kensun and i got them from amazon.com for $90 total with shipping and a 2 year warranty. They have great customer service.
Pros- Great light output.
Cons- You will have to drill a hole on the cover that you remove to replace the fog light bulb in order to install the HID bulb. The HID bulb is too long and will have to stick out a bit. I sealed mine completely with silicone and mounted the ballast up under the hood.
If i knew how to upload pictures onto this page i would show you some pictures on my setup. lol!