Here's my advice.
If you have the means to do so, get the projectors. The projectors are the absolute best way to do things.
The Delta HID's are very nice, but their color temp (7000K) actually reduces the amount of light you end up with. 7000K HID's puts out only 600 Lumens more than a stock 55w Halogen bulb, and would be about the same amount with an 80w halogen overwattage bulb.
For a good comparison, look at this page here:
http://24.248.84.138/hummers/headlig...visionplus.htm
Towards the bottom are some charts involving the color temp versus lumen output. Your most efficient HID setups (projectors or reflectors) will be in the 4200 to 5000k range. I run 5000K's on my truck. My wife's BMW is in the 4200K range.
FYI - Steve