I've had my ARB locker for about a year now. I lock it up only when I really need it and it gives me that extra edge when I'm offroading. A big improvement over stock. I think the rear driveline is tougher and probably could take more abuse than the front.

I've put alot of thought into the Calmini front LSD, but some of the horror stories I've heard make me a little hesitant. I'm sure that it would be an improvement over stock, but once again I wonder if it would be worth it should I start tearing shit up. IMO, the front end is not that strong and you put enough torque on the front drivetrain, somethings bound to give sooner or later. My guess would be the CV's.

I'm going to wait and see how they perform over time, and what damage I may risk if I go that route.