I went to forged 31 spline axles and an Eaton Pro diff with 4.30's. If I wanted a super rearend like Jeff's(Dalamar), I would have the tubes welded, 9" end's put on, 31 spline axles and a Detroit Truetrac diff. Along with a T/A performace diff cover. But that's overkill for most.
To add a lil something here. I've found that the "real" brands like BFG, Goodyear, Firestone, etc are closer to their staded size, width and height, than the no name brands like Nexum