I've found that the best kit to use is from JD Lighting on (don't kill me) passwordjdm.com . The kit comes packaged very well, has all the water resistant connections, and actually WORKS. A 9007 bi-xenon kit is $169.99 + shipping. It can be found here:
JD Lighting HID Conversion Kit (9007) Bi-Xenon | Password JDM
It really is a great kit and I recommend it to everyone. I deal with automotive students all day; they all want HID's, and when they buy these, they're very happy and I'm happy that I don't need to go out and try to fix whatever the HID manufacturer screwed up. I have another student with a RSX who got the DDM set and he's on his third set of ballasts and second set of bulbs. I'm not impressed with them. I have not personally tried DDM stuff, but with all the good things I see about the JD Lighting setup, I don't think I'll go anywhere else.
