Don't bite off more then you can chew. Be honest with yourself about what you want, what trails you wheel, and what trails you want to be able to wheel. Like Johnny said, Upgraded oem axles, hp 30/c8.25, can handle 35's, and bolt right in. D44/d60/14-bolt can potentially handle 37-44" tires, but custom suspension, custom steering, custom brakes, custom driveshafts, major body trimming will all be needed, you will probably have to run at least 16.5" or 17" rim to clear the bigger brakes, not to mention you almost have to run big tires for more clearance under the axles.
So, if that's something you can handle and are willing to jump into then go for it. But if you prefer the simplicity of bolt in then build the oem axles.