Re: NZ1 and NZ2 are fine
The economy seats, and overall service, are far nicer than BA or AA. After Air New Zealand kindly dropped its direct flights from LAX to the Pacific Islands, this was the only way I could carry on earning miles in my preferred programme (BMI - remember them?) and avoid Fiji's Air Pacific. On those occasions where I could afford the time, I had a recovery night in LA, on the way out, and a holiday in Santa Monica, on my way home.
Now, on the legacy carriers the A380 has been a huge disappointment to me. It's just an exercise in cynicism; they gave nothing back to the paying customer in terms of comfort. Fly economy on the Emirates A389, OTOH, and you get a larger, wider, more comfortable seat, with plenty of good entertainment options, reasonably priced WiFi, and not so reasonably priced mobile roaming.