When Ken and I stay in Auckland we stay at the Stanford Park Hotel. It is right in the heart of Auckland about 5 minutes walk from the waterfront. A nice classy hotel with nice rooms nothing super swanky but very comfortable. President Clinton stayed there and they have the best club sandwich called "the Clinton". Ken and I always have one of those when we arrive at the hotel.
I do recommend spending some time in Auckland it is a beautiful city. If you can go down to Huka Lodge you will see some beautiful country side and this is a truly world class facility everyone loves it. Not cheap but worth it - I have never stayed there myself but it is certainly on my "must do list".