Mark...
I think that retrofitting HID is a bad bad idea. this is just my opinion though.
I actually had the HIDs measured at something like 4000K+++++, fit into Morette Ecode projector lamps. This kit was $1,200! I learned the hardway that unless you are a lighting/electrical EXPERT, stay away from NON-oem HID kits!!!!! Please, trust me, not only are they hard to deal with, the companies that sell them are impossible to deal with. They are often not even HID, mostly just painted bulbs. AND, if they are retrofitted, chances are you lose your highbeam and the reflectors weren't meant for them so the beam will suck. yes, it will. Sorry to be so bitter about HIDs but they aren't worth it unless they are OEM. By the way, anyone thinking of buying HID lights from
www.hids4less... read here first!
http://forums.nasioc.com/forums/showthread.php?s=&threadid=305937. I am actually about to enter legal action with them as they did not stand by their product, which was delivered and installed, by them, with a flaw.
on another note, if you own a subaru, join that board, they are increadible in the community. so nice and informative, its great.
in summation, unless you want to tinker with your lights constantly, and your a pro, my opinioin is to stay away from HID.