My last TJ had the Boosted Tech supercharger, and I'm in the process of putting the Magnum Powers supercharger on my current TJ.
Why did I do it? Simple:
When you are going up a mountain pass in a TJ with an automatic transmission, you'll be in 4th gear at 60 mph with the OD on. When you decide you want to pass someone, you turn the OD off (so it kicks it into 3rd gear), expecting to pass someone with ease. Instead, there is no discernible difference in power, just a difference in noise. It goes from loud to louder, yet you aren't really going any faster.
The supercharger takes care of this 100%. Instead of not being able to pass someone, all it takes is half throttle or less (and no downshift) to pass.
My goal is to have around 270rwhp, which should be very, very possible, considering I'll be running 11 psi, and the air will be cooled via a heat exchanger and a water-to-air aftercooler.
For those who are curious, this is the kit I have:
https://magnumpowers.com/product/ornare-et/
I had considered going with a stroker, but I hear about too many long term / longevity issues with them. The other thing is that with the Golen stroker engine I was looking at, they wanted something like $6500. For $5000 I can get a supercharger which will have more power, more tunability, and won't require swapping in an entirely new engine.
With the supercharger, I also have the ability to run up to 25 psi should I ever decide to strengthen my engine. So I like that there is room to grow.