I recently installed a bi-xenon (high/low beam) HID H4 conversion kit into the VX. I purchased it online through ebay for $135 shipped with the 5000K bulbs.
Direct link to same kit:
http://cgi.ebay.com/ebaymotors/H4-50...mZ150265053002
Just a review...everything arrived quickly and he's a U.S. seller (I'm sure everything comes from China) and everything appeared to be decent quality. I have a very expensive set of slim digital HID's on my Aprilia from www.xtralights.com and at $500 a pair, I have first hand experience with the really quality stuff.
With that said, the installation was a breeze, no splicing whatsoever. Just plug and play with a positive/ground wire going to the battery terminals. The only issue I had was the crimps on the connectors for the positive power wire. It's a two-wire setup with two 15A fuses that merge back into one connector. Two of the crimps at either fuse were less than adequate and the crimp at the battery terminal connector was also less than adequate. Five minutes with a crimper solved the issue which had one light going out every time you hit a bump. When I first installed them, both bulbs fired right up and I let them burn in for ten minutes.
My only other caveat with the kit is the color temperature. I ordered 5K (they didn't have the 4300K bulbs) and they're pretty much 6K bulbs (what I have in my Aprilia) and much more blue than the 4300 OEM bulbs in my Evo. I also noted the HIDS make the crazed (micro cracks) in the headlight plastic stand out more so than normal bulbs. Time to get the 2000 grit sandpaper out again!
Will report back with time to see how the relay holds up. It's noisy. Clicking on the high beams, you can hear it inside the cabin.