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Installing HIDs is the second favorite thing I've done to the truck only behind disabling the double horn honk. The difference in light output is significant.
There are quite a few threads on all this here in the archives. Some more info here:
http://www.expeditionforum.com/threads/2017-hid-headlamp-update.32801/page-4#post-285009
And no issues thus far.
In terms of aftermarket technology with regards to lighting, LED headlight bulbs are still in their 'infancy', they're getting better with each generation but until they can get sharp and even light patterns from the LEDs like how a Halogen/HID filament does in a projector, LED bulbs still have a ways to go.