Have you moved this yet? Irish banks are very expensive for transfer. Firstnzcapital is an NZ bank which can hold accounts in foreign currency and transfer when you wish. Website seems to be hving problems. We opened an account through a frinancial advisor in NZ so I am not sure if you can just open one as an individual. Transfers are made at bank rates and balances earn interest until you transfer.
Once the money is in NZD if you are not making immediate purchase, then Raboplus (online savings bank) seems to give best rates consistently (you do need to likt this to a traditional bank account for transfers though.