Villa Marie a good North Island outfit. Our friends "across the ditch" have a cool climate thing going on. They make some impressive whites,chardonay ,pinot gris.I hate sav /blanc so you will have to do your own research Oyster Bay not a bad start if to insist on starting in the first place
Reds are a bit of a challenge South Island its pinot noir & it aint cheap! They have cracked the code & there are some quality wines.
North Island they grow some merlot ,cabernets as well but they need to be in the warmer parts,Hawkes Bay or similiar to get them to ripen.
They do make good beer, Monteiths & Speights from the South Island ,big company ,well big for NZ, lots a micro's.