Right, first you gotta figure out the tire size that you wanna run. If it's a 33 (especially since you are going for aftermarket rims) you need to get a BL and at least a PML first and then the tires. Sliders should come next, as rockers are volnurable once you start wheelin' Then I would go for other armor like skid plates and finish off with a front bumper.

Once you get some wheelin' exerience then you can proceed with the locker, when you feel that lack of a locking diff is limiting you at that point.