No problem.
Most won't sell HID's over 6k. 5K is white like factory. 6k has a blue tinge to it. If you cam find 5500K even better. I haven't seen those yet.
The ballasts also come in a couple of wattage's as well. 35W and 50 or 55W. Bulbs are the same. It's the ballast. More power, more light, more heat, lower bulb life.
Anything over 6 and you start losing luminous light ability. The higher the K, the different colors it gets. Looks kind of cool, but sucks to see anything. Also the Leo's can give you static as your limited to what colors can be out front. IMHO it's Rice.
If you can, I suggest reaching out to JJ for a harness. If you haven't got the lights or ballasts, might as well get them from him as well.
If you don't want to go that route, you can check locally. Most stereo shops supplement their income by selling and installing HID and remote car starters. Even some speed shops. Most that do a lot of them will have pretty much everything there that you'll need on hand or 1 day away.
It sounds intimidating, but it really isn't if you have the right parts. I did all 6 on mine. I'm running 35w Lumens HID's in my set-up. I'd suggest that for the fogs. You could get away with 55's on your low beams. I'm not sure if you have a quad set-up or duals or which way you were thinking.
If need be, I and others here, can help you through it.
If you look here:
http://www.ramforum.com/f41/quad_projector_install-40565/
You can see where I mounted my ballasts and 1 of my 2 relay's for the lows and highs. There's no rule as to where they have to go. It's just an idea. The fogs were easy.
Let me know if I can help.
Heywood