Trying to set up my build and I am really thinking I want to go with a RK 3.5 kit, but how do I figure out which one I should get? Too many options. Mid arm/long arm/pro lift/Flex/x-factor/maxtravel/x-factor plus/coil over/triple threat/etc.... Crazy! It will be going on a 4 door JK Rubicon. Would like to run 37's with the option to maybe go bigger later on. Will be running PSC fenders for clearance. I am into rock crawling, not mudding/bogging or whatever that crap is called. I am not on to much of a budget, but do want to keep cost down as much as posssible without sacrificing quality, performance. What do you guys think? Help me out here.