I may be a little late to the discussion, but IMHO 33" tires are on the small side for a steady diet of black trails. And choose wisely because some hidden winch mounts can reduce approach angles. If your objective is to conquer black trails, a rear diff lock is practically a must, and a front diff lock is a big help, but learn to control the urge to use the loud pedal when the front is locked, otherwise, you'll want to stock up on spare CV axles. 35" tires adds significantly to the capabilities, but also stresses the CV axles more and would require more lift (aftermarket upper and lower control arms and possibly a body lift). You should also be mentally prepared for some occasional rock rash. Articulation, clearance, strength and approach angles are the ticket for black trails. The first three tend to take away from the street manners and handling, but that is also why the 80 Series, with solid front coil sprung axles is a better potential match for black trails than your GX. I have not seen very many rigs set-up for north east black trails that also make good sense as daily drivers. Fernando's 80 Series was close to that magic compromise. Think about what the primary use of the rig will be.