My question is, what modifications make the most sense if I do buy a new Rubicon as opposed to a used one that has already been modified?
Thanks.
First off, welcome to the world of the most aftermarket supported vehicle in the world. Second, research and planning is your best friend. Do not go and make mods just because they look cool. Third, if you buy used get a 2012 or newer this is due to the 3.6 liter 285HP motor as opposed to the 3.8 200HP motor.
Here are a few items to start thinking about. First a "rubicon" package is an off-road package that contains 1. a larger front axle (dana 44), 2. a very low 4:1 low range transfer case, 3. electric locker in both front and rear axle differentials, 4. a push button operated front sway-bar disconnect, 5. 4.11 ring & pinion axle gearing ratio. If your plans will entail replacing most of these items then the rubicon model may not make sense for you. For those of us that want an extremely capable factory platform on which to mildly modify the rubicon is the way to go, period.
Not sure how 'hardcore' you plan on your jeep being. Some say my build is hardcore while other say close to the opposite; it is a matter of perspective. This is where research and planning starts to work for you. One only knows 'what makes sense' if where you want to be is known. However, once you have a game plan things will surely change as progress is made, this is the nature of the beast and part of the fun. The purpose of the plan is to save money or at least get you the most capability for each dollar spent.
A modified used vehicle will be cheaper than buying a new or used and then modifying it. You can never get back what you have spent at resale time. The key is to know what you are buying. One has to be familiar enough with jeep mods to tell the difference in quality and quality of the install. This is another area where research is key.
To me personally a mild lift, larger tires, bumpers and winch(s) are basic and reasonable and 'make sense' to me. To others it may make more sense to buy a fridge, drawers on slides, and awning first. Once you know the capability you want then it will give you an idea of ground clearance (tire size), amount of suspension articulation desired (type of suspension lift), armor needed, and amount of self-recovery equipment needed.