WELD IT! Weld the rear and put an aussie in the front. Never better. Wont break the bank or your truck. Tire wear is a load of crap. I have been running my 33 swampers with a welded rear for 3-4 months as a DD and I have seen ZERO abnormal wear. Do it and dont look back. A locked rear makes a world of a difference.
I'm welded in the front, but I don't really like it. I plan on swapping the thirds out between the front and the back. Mine is trail only though.