I've used both the Cibié and Hella housings, and although I personally prefer the Cibié, they're admittedly more finicky in regards to bulb selection. I like the pattern from Philips bulbs the best; Osram is okay, but neither offer artifacts in that housing. Hellas don't throw as nice of a pattern as the Cibié, but they offer more latitude in bulb selection insofar as "acceptable" is concerned...so it'll be easier to get nice results from them. I've found that the 4200K-ish bulbs provide good color rendering from both housings, and - as mentioned - you really want to upgrade your harness; with inadequate voltage, you get inadequate results. Be especially conscious of your grounds, and don't skimp on quality relays. If you want a one-stop-shop, contact Daniel Stern.