D30s are ok, gearing is ok also, I bought one sunday with 4.88s and chromoly shafts for 300 bucks. Now I just need a 4.9 rear pig.
d30 dont break, OSR, there housings bend, if there breaking shafts there housing is already bent.
You find them from 25-400 bucks, with higher end ones being sold around 400. For a pathfinder there fine, there like a toyota axle but cheaper too find.
Also, OSR, if there breaking axles or housings with tires less then 33"s then there beating the living @!*% out of there trucks.
For an aol lift there good enough.
Now if the OP is looking to run 34+ inch tires then yes a d44 will work loads better then a d30. And in that case I would say get a large knuckle ford d44 front.