jarledb: Don't think I will be able to wait until december, so will get a 5s from the US with a Apple Care plan, should take care of issues here in NZ right?
There will be lots of 4G variants of the iphone 5S/C - you would have to be very careful to get one that would work with the NZ 4G frequencies. Even then it seems the upcoming 700MHz 4G might not be supported .