have you tried hyperwhites?
not the lame ones that have blue stuff over the bulb, but true hyperwhites. piaa has some good ones, the xtreme white has gotten good reviews. the superwhite is not as good but a little cheaper. alot brighter than standard low beams but still easy on the eyes of others.
http://www.tirerack.com/accessories/...tremewhite.jsp
60$ there, may be able to get it cheaper somewhere local.