If you've had PS+ since the vita got added to it, the console is already worth the price of entry. I've had Wipeout, MGS collection, Uncharted, Rayman, Lumines and others without having to spend anything. Chuck in Persona and LBP on top of that and it's a really neat little platform.
Was in NZ over christmas, we flew from Heathrow. Make sure you allocate plenty of time to the south island, that's where the good stuff is at. Be sure to visit places like Queenstown (I recommend the speed boat ride there, is a little pricey but totally worth it - fantastic way to see the landscape).
Auckland and Wellington are neat but be prepared to be surprised at how small those places are - Wellington is tiny for a capital. They're cool places to spend a couple of days (the Weta Workshop is worth a look) but you'll probably want to spend the majority of your time getting lost in the sticks, Fellowship style.
On a related note we went during the Hobbit craziness - Auckland airport was nuts.