Another option is like I did; use the Detroit Locker in back and put the ARB in the front. That way if one system fails, the other is still operational. If you order an ARB for the front, make sure you order one with the correct spline number. Evidently Dana put a oddball number spline shafts in the Dodge diffs. At least in '95 like mine. Either system is good. They're both stout, heavy duty and well regarded in the hardcore offroad community. The ARB is prone to air leaks, a minor nuisance. The Detroit occasionally makes a loud bang ( the first time I thought my diff grenaded!).
Spend the bucks here and you won't be disappointed.
Spend the bucks here and you won't be disappointed.