a bunch of us have 2-3 cards in our wallets.

ANZ - for SP Bonus on NZ/*A flights
Kiwibank - for buying APD (can be the non-plat card)
AMEX - for best APD earn rate
Westpac - for Priority pass

it comes down to if you think you'll get value from paying the annual on a combination of these cards. For the ANZ card - definitely yes