Coilovers are not only the best suspension you can currently add to a serious offroad vehicle but they are just as good when added to a daily driver/weekend warrior vehicle too. Do you need coilovers, absolutely not! If you are happy with what you are running now, keep wheeling with the suspension you're riding on, and keep saving the money for the upgrade to coilovers in the future. If you were going to do one end of the vehicle at a time, definitely do the front first as it will be the most notable. And just a reminder, just any coilover is not the same as an EVO spec'd coilover. The EVO kit has been thoroughly researched, developed and tested to be the best solution for all styles of terrain and driving.