Nikon makes a decent scope. The two things I don't like about them are the lack of adjustment range,and the dark coatings they apply to their lenses.
I don't know if you can get these brands down under,but I'd look at the Sightron SII or Vortex Viper scopes.They should be in the price range near what the Nikon Monarch 3 is,and they are much better optics for the money.
The Zeiss Conquest line will have the brightest glass you can get in a decent hunting scope.
Texas State Rifle Association
North American Hunting Club