Can't you just mod your existing headlamps to use LEDs instead of regular ones? I would think all you would need to do would be to add a resistor or two to the line to lower the voltage a little bit and then pop in between 10 and 20 ultra bright LEDs in each lamp fixture to make it work...seems like it would be simple enough in theory. Then in the back I would wire up a string of LEDs that ran along my bumper as night time rear lights, that way only the break lights are using the regular lamps.
Gotta love instructables.com
http://www.instructables.com/id/DIY-...r-headlights!/