The Spyder projectors are the easiest way to go with an upgrade. 2 options on designs and various vendors, but they all suffer a thin cheap plastic bracket that when over tightened breaks, and they have to be adjusted and occasionally modified with more support to keep them from "bouncing" when you drive.

The retros are about the same cost, but you have to do it yourself. You have to tear your housings apart, drill, cut and splice a projector set into the housings and they work the best, brighter, proper HID or true projector quality, but you again have to do it yourself. Or pay top dollar to have someone else put in the labor hours to build them for you.

HID's work in the stock housings but you need to go 35watt ballast/bulb sets to keep from overheating the OEM housings. And you get really bright light, but it is everywhere and you blind other drivers and it doesn't work the way it really should. Like high beams on crack 24/7.

Its up to you... searching "spyder", "Retro", or "projector" will get you numerous threads on this, good luck, let us know if you need more detailed info. & Welcome