Yeah, if you're going to skimp on anything it might as well be your lighting.....
The cheap Chinese enclosures don't focus the light anywhere useful, are a cop magnet, blind other drivers, are not DOT approved (and hence an illegal upgrade in all states), tend to leak.... shall I go on? I won't start on the HID kits themselves (you're better pulling the OEM setup off a high end donor in a salvage yard).
Also keep an eye on your local legislation, there's been a big push in recent years to begin aggressively pursuing owners who make such modifications. I think this is bull$h!t, but it's caused by certain types of people who think it's cool do drive a car that'll cause sunburn if exposed too long.
http://www.danielsternlighting.com/tech/tech.html
Headlight rewire:
http://www.danielsternlighting.com/t...ys/relays.html A worthwhile mod on most older vehicles (and a surprising number of newer ones).
That said, I'm done wasting my time on this topic.