The Pro Com lean comes from the original pro comp 2" kit not having a longer/stiffer spring or the O/S/R of the car, later kits had these. My current car has these, whereas my first jimny 2" kit didnt and i had a spacer made. So if you can get a Pro Comp lift kit go for it as its loads cheaper than anyone elses, just remember to get Castor bushes, and extended brake lines from Llama 4x4.
Gary