Chapter One - Parnell Square - Michelin Star, pricey but the food is the best in Dublin IMO
Diep le Shaker - Just off Pembroke Street - Asian Food, fantastic food and great craic, good cocktail list too.
Shanahan's on the Green - Stephens Green - Pricey enough but good steak and can be quiet enough.
Rustic Stone - South Great Georges St - Haven't been there but the head chef had a Michelin star when he was in charge of Mint. I've heard good reports and it's on my list.
if none of them suit let me know and i'll think of some more for you