Interestingly - I played around with the OW online booking tool and whilst I couldn't get it to match the itinerary perfectly (it doesn't like the Aus surface sector and I was unable to choose some of the codeshare flight #'s and instead had to use the princiapl carriers flight #'s), I nonetheless got it almost the same (especially the transcons and US flights) and the QF quoted taxes came to $695NZD?