G'day MessmateTree,
 And welcome to the forum. 
 What the "Best" alternative is, really depends on your reasons to put a bull bar on the vehicle.
- Some put one on to protect from animal strike
- Some from better approach angles
- some for a place to mount a winch or lights or aerials
- Some just because they like the look 
For protection, in my view the best are either ARB or Opposite Lock.
Keep in mind the threads you just read about some users experiences, reflect more of the franchise businesses and staff that often install these rather than the actual product.
I have an ARB - on a 2012 D4,  LandyAndy has the Opposite lock on a 2014, both are great bars and I'd trust either of these  miles before I'd trust the OEM product to protect my vehicle.  They both give you significantly better approach angles offroad.
Mine:
 Andys:
Andys:
 
Good luck with the search, I'm afraid I don't know the details of the NZ mob.
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