From your list, DEFINITELY the Mazzer- which will very likely be the last grinder that you ever buy. Macap and Compak are both great as well. Are they available in NZ??
These three are commercial quality and worth every cent of the extra spend. The stepless/micrometric grind adjustment is also a big bonus.
At present, low $700s inc GST will get a Mazzer in Aust with Macap a tad more expensive and Compak a little cheaper.
I guess option 2 would be the Rocky- but its not as good as the big 3 and some people find the stepped adjustment irritating.
Buy the best grinder you can possibly afford.....