Skip looking into LEDs. They cant throw enough light, and if they can, you can buy a new XJ with the amount they cost.
LED costs for headlamps are so bad BMW started looking into lasers as a cheaper solution.. laser light diffused by phosphor coatings to scatter the light.
And properly aimed and setup lights wont blind people.
Im the guy who makes new gauges, check out our gallery at Teamadw.com