First thing I would get would be some rocker protection. Other then that take a look at other vehicles on the board and see what mods have been done. There are quite a few ways to build up to your perfect vehicle.
First thing to ask yourself though is how hardcore of a rig are you trying to build? Are you going to sacrifice roadability in exchange for off road fury or are you trying to build a nice combo of the two? Mud bogging, trail running, or rock crawling?