Just a suggestion from a poor college student, but if it were me, I would start with whats cheap and simple to replace and work my way out from there. Start off with the poly- sway bar bushings as they are relatively cheap and simple to replace and if things aren't "in control" enough for you, then do shocks, and then maybe get new springs if the shocks aren't enough either. The OME coils for the Rodeo/Amigo give a Rodeo 1.5" - 2" of lift, which really isn't all that noticeable heigth wise, but the difference in the ride quality of these springs is astonishing. Just my .02

HTH,
Justin