The only headlights worth your time are custom HID retrofits(basically, a headlight projector from an MB, BMW, Audi or Acura), which cost in the neighborhood of $500-600 to have done. The stock headlights produce ungodly amounts of glare with HIDs and blind oncoming drivers.

Aftermarket projector headlights are really ugly (IMO) and decrease light output.

Any aftermarket light bulb will either be a little brighter than stock and burn out about 5 times faster or have much dimmer output.

Unfortunetly, it's really OEM or HID Projector with this car unless you don't mind blowing Silverstars every 5 months.