I went with SuperbrightLEDs.com kit and they are amazingly bright and plug and play. Big difference between the stock halogen bulbs in my 1997 F350 and the LED bulbs, plus the LED's pull 1/4 the juice the halogen bulbs pulled. Been switching everything over to LED bulbs as my pocketbook (and time) allows.
Cheaper LED's don't make the light output the more expensive ones do. I caught the ones on Superbright on sale at 15% off regular price. Made them a better value.
With a lifespan 30 times longer than halogen, you never replace them again.