Helo John,you say you are intending to hunt Canterbury and the West Coast so a lot of different hunting scenarios there, heavy bush, slips, river beds and open country, and a big variety in animal size as well so there's no one answer.
You probably won't be hand loading so you need something with good quality factory ammunition. Most new rifles like Howa, Tikka, Mauser, Bergara are entirely adequate for hunting, calibres from 6.5 to 308 are again all adequate, if possible try some different rifles for fit before buying. Do you have friends who shoot? Try their rifles if you can, look on Trademe for price indicators you can often find a set up rifle scoped and suppressed for under a grand.
Hopefully you can separate the diamonds from the dross in all the replies so far. Whatever you end up with keep us informed we will all be curious now.
Regards
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