Try to get a window seat for the approach into Auckland. Last time I flew to Auckland, we saw land out the windows, went out over the sea and then the wheels hit the runway before we saw land again.
I think you will like Singapore, they are my favourite carrier. Have you enrolled on their frequent flyer programme. It means you can checkin on line upto 24 hours in advance, it allocates your seat and if you don't like it there is an option to change your seat.