Projector headlight housings are very nice, even nicer with HIDs, but are not required for HIDs in some cases. My parents own a Lincoln LS with factory HIDs. The LS does not have projectors and the HIDs look great. I've noticed some other vehicles without projectors that look fine as well. I've ran aftermarket HIDs in my Supra with factory projectors for about 10 years, long before the cheap 70.00 kits. My first kit was a Philips and it was expensive to me(600.00).....I have McCulloch and Hella HIDs in the car now(low beams and fog lights), I highly recommend both brands. The Philips brand was a good kit as well, sold them to a friend and they are still going.....