No, nz isn't going to happen. Their economy took a pounding, jobs market is not great. People there on work permits waiting for residence and who lost their jobs have been told they have to pack up and leave if they can't support themselves.Off to NZ finally?
Far too risky a prospect at this stage of our lives.
So, safe option is UK - has its own advantages in terms of world travel etc, and reasonable care as you get older.