I went with an Ebay kit years ago. Took my chances and lucked out since they still work just fine today.
I went with 6k as I wanted the subtle blue look in my lights. As far as the high beams go: I stuck with halogens. I did this because I wanted my high beams to be instant-on, and not have the delay of the HID's to power up. Also, I wired in a homemade harness which also gave me daytime running lights at 50% power, so I'm obligated to use halogens now.
I have a few pics at the end of the initial write-up which shows the finished product including illumination pictures which you are interested in.