The "stiff" issue with rough country is from the 2.2 shocks. You can order it with out shocks and get some nice ones. The RC springs are fantastic in my opinion. I also have a 4cyl and ordered the 6 cyl springs, I got closer to 4 inches of lift from there 3.25 kit. They use the same springs with the 2.5 and 3/25 kits. They just add a spacer to make up the rest with the 3.25. You may consider the 3.25 kit it is more of a complete kit and you can just leave out the spacers. But if you need to level it out front or rear you will have 4-3/4 inch spacers to work with. I can say nothing about the zone kits I have no experience.