How is the best way to get from Sydney, Australia to Auckland, New Zealand?
Snorkel. On a serious note, you may be on the wrong forum, this is for Europe.
Everybody has non-stops that take about three hours. Emirates usually has the best prices. Maybe check kayak.com to see if there's something better. Sorry about the snotty first response.
Qantas. That's a quote from "Rain Man". We're looking at that route ourselves for 2014.