http://www.rennbay.com/lighting-c-58.html
You should definataly use the headlight relay harness if you plan to run higher wattage bulbs and it a great idea even if you don't. Running just the relay harnes typically improves the lighing quite a bit because it often increases the voltage seen at the headlight. For lenses, I would have to reccoment the Hella E- codes. They allow you to run higher wattage bulbs without blinding on-coming vehicles. Add the two together and your lighting will be very good.