Has anyone changed to HID headlight?

[MAC]

9007 (HB5) XENON Platinum 2-Bulb Set
New DOT compliant 2-bulb set producing a "brilliantly white" beam of light.
Featuring new lavender colored glass envelope and an exotic mixture of Halogen/Xenon/Krypton gases for excellent output with a color temperature of 3800K! Since this bulb is DOT compliant, it is considered 100% street legal!
#DOT-9007XPP2...$24.95
http://www.demandmotorsports.com/MM006.ASP?pageno=32

For DRL replacement Xenon gas charged 3157 Dual filament wedge bulb. Designed to match your HID or Xenon type headlight bulbs. Natural blue color. $8.95 each.
http://www.demandmotorsports.com/MM004.ASP?pageno=43

For DRL replacement bulb, there are LED bulbs @ $9.95 each. In red, amber (yellow) colors.
http://www.demandmotorsports.com/MM003.ASP?pageno=61