As sated above buy the 6024 halogens. If you want something better go to DanielSternkighting.com and he will advise you on your best options.
Relays are a good upgrade.
LED's are only legal and acceptable in housings specifically designed and approved for LED's. They also tend to blind oncoming traffic. I personally would like to take a hammer to every one I see...LOL.
In my 92 Dodge D250 I use Cibie housings with H4 bulbs which have a much better pattern than any LED you could put in it's place.