I don't see any reason to ditch the Nissan rear axle. The H233B is tough as nails.
My setup, for your reference is:
Calmini kit
3" body lift (from before the SAS... you don't need this if you're sticking with 33's)
35" tires
5.14 gears
ARB air lockers front and rear
Skid Row gas tank skidplate
Calmini front bumper
Shrockworks rock sliders
Homebrew steering system (the Calmini kit expects you to use the stock Jeep stuff and just provides a cheesy adapter to hook up the drag link to your Nissan pitman arm. Search this forum for "HD steering system" to find my thread about how I made it)
I think that's all the important stuff