While we're on the subject...
What's the difference between the "longarm" and "regular?" lifts? Besides being longer, I mean :shaking:
The short arm vs long arm discussion is very VERY long and drawn out, and you'll never get a straight answer on which one is better.
Generally speaking long arm is better for high speed running, like desert racing. Short arm on a TJ was okay on the rocks and certainly cheaper than LA, but over 4-4.5" of lift a long arm started making more sense. But the arms on a JK are 50% longer than a TJ, and I'm personally not convinced you need LA on a JK with less than 6" of lift.
For the highway, long arm will generally give you a better ride, but with the JK's longer arms I'm not totally convinced it is needed. My Poly 4.5" lift pretty much drives as nice on the road as the vehicle did when stock. It feels and handles just fine.
The LCA's with long arm kits can become a rock magnet, although the argument is that use them as sliders or ramps for sliding over rocks. I suspect that shortens the life of the bushings/joints quite a bit, and you always run the risk of bending one.
Like I said, you'll get many different views, each with their own theory/reason why one is better than the other. The best thing you can do is drive and/or watch vehicles with different set ups and decide for your self.
Does the long arm kits move the mounting location of the track bars?
Depends on the kit I would think, but I don't think any require that. It is mouting locations for the control arms which will change.