I presume you have noted on Egun that many of the offerings are not available for export - and they mean export to EU countries, never mind to NZ. The costs and delays of getting an export approved since a German law change a few years back have become considerable, so I'd hope you have a plan for getting an export licence without using up most of your budget.

The tip-barrel rifle seems to be inherently accurate, at least in the examples that I'm aware of. You might like to talk to Klaus Pommer Agencies, (KP-Agencies) in Auckland, NZ. Klaus will be back in NZ in the next few weeks and it would be worth touching base with him to see if he has any for sale or if he could look out for one for you.