I'd second that recommendation for the Wicklow Heather (in fact I clicked on your post specifically to recommend it, not knowing that someone had beaten me to it.)
Just back from a terrific weekend there, staying in the attached B&B. Extremely good value and the food in the restaurant is very good. It's also a lovely spot decor-wise - decorated with (presumably) the owner's hugely impressive collection of Irish first and rare editions.
(Though if the owner is reading this, though, s/he might consider moving some of those interior lights in the cases away from the pages and spines of those books...)
Anyway, great restaurant, lovely atmosphere.