That is interesting there is such a difference between NZ and Aust re: Instrument Rating.
One thing not to get caught out on (in Australia at least) is when you start looking to get out of piston GA you can come across a requirement to have anywhere from 3 to 5 renewals as part of the recruitment minimums (S.A, Pearl, RFDS etc).
I know it caught me, but at least I have been able to claim it back from the ATO, something you cannot do if you are yet to be employed in the industry.
It is a catch 22, however I'd get it earlier rather than later, just like these damned ATPL subjects.....
OpsN