Depends on what style you're looking for. EVO-R makes a really great looking kit and is very affordable. I'm going to go that route after I pick up a set of wheels later this coming year. They offer HID as an option for $300 more. Here's a link to the headlight conversion. I give it two thumbs up
http://www.evo-r.net/product/FD-pulley/index.htm
Justin