Get a locker in the rear. I have one and it's great! I have a lock right and it cost me a little over $300. I've wheeled the crap out of my truck. My problem is that I always run out of clearance before I lose traction. Going up a mostly rock ledge I had the front tires a few inches off the ground while the rear was pushing it up. Screwed up my torsion bar bolts and made parts of my underside all shiny but the point is that it worked amazingly well. If I had one in the front I wouldn't have been as screwed so maybe an Aussie Locker could have benifited me, lol. It's my DD and I don't have any problems with it. It clicks around corners as it's an automatic locker. The 8.8 is pretty strong and even though I only have the 28 spline I haven't had any trouble with breaking anything (knock on wood). I have almost 10k miles on it too.
05' 4x4, Auto, Locked
F&R, D44 SFA & 8.8 w/disc & c-clip eliminator , Yukon Chromo's F&R, Custom Skids, Sliders, Bumpers, 35" BFGs, 5.13 gears, Riddler & Solid Diff Covers, Superchips Flashpaq, CB, Optima Red Top, Gibson Exhaust, K&N Air Filter & a lot of other little things.