The best thing you can do is buy a HID set from Twiggy on dodgetalk.com
Hes shutting down shop, but unlike all the cheap kits, he builds them himself. He uses Phillips ballasts, not cheap Chinese ones. His kits are like $90 or so right now.
I just installed Twiggy's HID kit on my Dad's 6.7L Mega Cab. I used his 4300k Bi-Xenon kit. Works great and impressive lighting. To bad he's getting out of the business.