Do a retro or just keep the stock halogens. Those cheap kits (double meaning there!) Are nothing compared to a proper retro. Our housings are not made for HIDs and the scattered light all over the place will prove that to you if you do a PNP kit. Let me know if you have other questions. Go with a set of projectors from TRS, Phillips 85122 bulbs, denso or matsushita ballasts, and a wire harness and you will be set!
Almost forgot, to get the most light on the road, go with 4300k bulbs. Those blue 6000k bulbs actually give out less light.