I ran lunch boxes at one time, the detroit variety, I would stay away from those, I broke both the front and back, cheap easy to install, but the old saying, you get what you pay for. I run detroits now, the rear has been welded to become a solid orb of traction beacause I exploded it at the GAP on Marcs wall and I am too cheap to replace it. The front one has had the side gear replaced, which was about half the cost of a new locker. I hear the ones I am running are called the soft locker as oppsed to the "hard" locker and the soft locker is prone to stripping the side gears when you have a shear break on the axle. I am no expert but that is exactly what happened in both cases with mine. The guys I know with the ARB's rarely have "break" issues, they might have an occasional air line or compressor issue, but like John G was saying, that would probably be the best. The other good thing about the arb is that if you run on the pavement at all when you unlock them they act as open front and rear ends which in my opion is the best of both worlds. I have heard good things about the yukons too, but have no hands on experience with them. Just my 2 cents.
