As others have posted above, LEDs are really nice, seem to be the best lighting technology available right now. That said, LEDs gone bad are far more expensive to replace than conventional halogen or incandescent bulbs. And although LEDs theoretically last much longer than conventional bulbs, in the real world that's not always the case, it's a resistor or capacitor or some other electronic component that goes bad and renders the LED "bulbs" themselves inoperable.
LED lighting units can't usually be serviced, because it's not just the LED "bulbs" themselves, there are PCBAs (printed circuit board assemblies) that power up and control the LEDs, so you have to replace the entire light assembly, which is why replacing LEDs is typically way more expensive than bulbs. You can't just open up a light assembly and replace the individual LEDs themselves, and usually it's not the LED element itself that poops out, it's the aforementioned resistors/capacitors/etc on the PC board. And on top of that, most LED lighting assemblies are plastic-welded shut, so you'd have to use a Dremel or whatever and slice the plastic housing open, and then how would you re-seal it? Not a good option. SO if a $1 capacitor goes bad, you're in for a $200-500 replacement assembly, plus labor.
Aftermarket is a good thing - the dealer wanted $800 to replace both LED taillights in our family car ($250 ea for the taillight assemblies, so $500 in parts, and $300 in labor), I found good-quality aftermarket ones on RockAuto.com for $67 each. So with shipping cost thrown in and doing my own labor, I solved the problem for $150. Still, compare that to $5 for a conventional incandescent taillight bulb.
Good lighting is absolutely essential, especially for "older eyes" like mine, and the added $1000 for the LED package, if you avoid even one minor collision, would be well worth it. I do love LEDs for their performance, but don't kid yourself on the total cost of ownership where LEDs are concerned, they are more expensive to buy initially, and way more expensive to repair. Worth it, but performance costs.