Really, all you need are the headlights, a relay harness, some minor wiring, and a brain. I've looked into this, and I'm not sure why dealers and whatnot get so gun shy or insist on replacing the entire headlight harness.... You can get the headlamps with bulbs and ballast for under $1000. The harness is not needed unless you want to waste a lot of money. The headlights each need a fused hot at all times power source, and the relay harness is needed to ensure the low/high beam functionality works. You can use normal aftermarket fuse holders for the power, I plan on locating the factory BJB minifuse terminals and adding the circuits to use the factory HID fuses. The hot pin is already in place in the BJB. It'll look much cleaner.
Personally, I plan on using the 2013 headlights if I can confirm the fitment is the same as ours. I dig the LED's and the darker color when compared to the 10-12's, and since ALL models have them standard, I'm thinking they will drop in price quite a bit as more hit the road. The 10-12's will always be more rare since they are not standard, and I don't like the way they look anyways.
2011 GT 6MT (Cookie Monster) - The 1/4 life crisis. Brembos, 401A, drop top, Grabber Blue.
1974 Dodge Challenger - The money pit. 408 SB stroker, Megasquirt 2 EFI, 904TF, 3.91 gears. 16MPG and 520HP goodness
2004 Hyundai Tiburon - The winter beater.