Axle swaps stuff

I have the auto, currently have a limited slip diff, that kicks on when I usually sliding around in the mud. I want lockers, dont mind if they are electric or manual.

i was thinking of going to 33s, with a 3" suspension lift and 5100 2-3" bilstiens. my cousin keeps saying that i should get a dana 44 or dana series axels. though he has jeep so doesnt know the struggles of a nissan. He mentioned he was going up to 37s and asked if i wanted his 35s. so i figured why not ask and see what it all intales, ive been researching this one for a few weeks now. I know its going to cost me around $2000 for lift, tyers, and shocks. I got family that are mechanic savvy and can help with the labor.

4x4 as it says in my original post.