I guess it depends on how you plan on using your Jeep and what you consider to be a good ride. TeraFlex coils are about as firm as they come and if that's the kind of ride you like, they'll work out well for you. Because they are firm, they also tend to run tall so, if you want a 3" lift, I would look at their 2.5" coils and if you want a 4" lift, I would look at their 3" kit. I personally wouldn't go any taller than that. As far as their shocks go, I would pass on them as they are just basic hydros and nothing to write home about. I would look at a set of Rancho 7000's or Bilstein 5100's instead.