We've been considering moving down here for a really long time. I think it's sort of enevitable in the long run. I have no idea when we are going to do it though - might not be until retirement age
The lifestyle down here is awesome, and you can get a nicer house etc for reasonable money. There is also healthcare and a higher quality and more accessible education system down here, plus a lot of family support (having a kid changes some of these equations). There are other reasons too, but the board isn't the right place for that kind of debate.
NZ also has miles and miles of twisty ass-roads.
Christchurch is in the south island - so it's a ways away from here (top of the north island).