I think the best all round deals at the moment are with Anglo Irish bank, http://angloirishbank.ie/.
Check out Investec bank too, http://www.investec.com/Ireland/. They have a 6 month deposit account at the moment (5.58% AER) up until the end of March which has the best rate on the market but it is only covered up to £50,000 as they are covered by the UK protection scheme but you can double this for a joint account.