At the moment it's only got the LSD in the rear, but I rarely have any problems.. The tyres it's currently running (silverstone extreme) give me enough traction to get in enough trouble if we get stuck, winch through and keep going. Luckily we didn't get stuck that day, the weather was closing in a hurry about 100 miles from home.
ARB Air lockers are on the cards but right now that $4k can be spent better elswhere, you know how it is.