I put a set of Eagle lights projection unit in my 2011 FLTRX and love em, got them on sale for about 225.00 shipped and lifetime warranty, can't beat that IMO. the fit 1998-2013 check em out. I posted up some pics on them in the lighting section.
If your 04 uses H4 bulbs buy yourself a nice set of LED's. I'm currently using a set of OPT7 LED's I got for about $90. online. I love them and I never have to use the high beams anymore. Oh and while you're in the fairing messing with the headlights I'd recommend converting to the 2010 and newer style so you can remove or replace your lights without having to pull the fairing off. Best thing I did to my 09
09 Mirage Orange Pearl
Some people just need a high-five. In the head. With a chair