So are these HID bulbs made to fit in the H4 & H1 housings that you have currently installed?
I talked to Dan Stern a while about about that, and he didn't recommend it, due to the way the light is actually generated inside the bulb in HID vs. incandescent bulbs. The housing/reflector assembly must be specifically made for HID bulbs. I know you've got HID specific housings on order, but I'm just throwing that out there for others who might be tempted to use HID bulbs in their H4 and H1 housings.
I also did alot of research myself a while back, and the highest color temperature I would ever go with is 50000K. It doesn't fall to a "courtesy to oncoming traffic" thing so much as it does a safety of the user thing. 43000K color temperature allows the optimum reflection off traffic signs & reflectors, and best contrast in the majority of road conditions to allow the driver to see details in the road and foreign objects like rocks and whatever else might be in the road. There are also factors like what color temperature the human eye sees best but that was alot of technical stuff I didn't quite grasp. However, a higher color temperature (which I honestly can't remember right now) allows better visibility in heavy precipitation, which I see alot of in eastern WA and frequent trips to the Seattle area. 50000K is also about the highest you can go before getting a very slight (and increasing as the color temperature goes up) blue hue to the light. DOT (and Dan Stern also backed that one up when I asked him about it last year) has 43000K as being the highest legal color temperature for any headlights due to these factors. At least, this was the case about a year ago when I was researching going to HID (but at the time the only options available to me were finding bulbs to use in my H4 and H1 housings, which has changed since then).
Not trying to s*** on the good work you did on your conversion (or the idea of going HID in the first place, which I like), but I wanted to throw out what I've discovered when I last researched HIDs for my 62.