I think a good place to start with would be to add a 2" budget boost and 1.25" body lift, add some 33's and drive it, see what you think. If you want more off road capability then add a lockright style locker to the front end. This is relatively inexpensive, if you want to go bigger later you can sell the budget boost, and be out only a small amount. A TJ with 33's and some lockers is pretty dang capable, and you would probably be really surprised at where it will take you.
I have 4 new zone hydro shocks for sale...PM for a price.