And for the record, these are no good? 04-08 Pontiac Grand Prix Halo Projector Headlights - Black
I heard bad reviews about the Spyder ones, and now that I've looked around, EVERY projector for 04+ seems to be this model, just rebranded... but it seems like the reason they didn't work out for some people is because these are actually meant for halogens, i.e. you have to recess the HID's like in the stock housing. I could be wrong, but on another forum that I'd rather not join, a member recessed his and the pattern looked pretty good actually... I'll post a link if anyone would like to see, but I have to see if that's against forum rules, not too sure.
^Decent side by side comparison of the 9006 halogen vs HID. The filaments of both seem to be close to begin with, so the amount of adjustment should hopefully be minimal...