If it is any help, I came across a right gem a few years back and it has remained consistently good and GREAT value.
It is a small Italian restaurant in Temple Bar (don't be put off by the location) called Il Baccaro. It is a genuine Italian as in the Italian community in Dublin eat there.
Don't expect any pizzas and there are only one or two pasta dishes on the menu - the rest of the items are pure Italy such as Italian sausage, veal and they even have a vegetarian dish which (according to my veggie friend) is fantastic.
Starters are typically Italian - parma ham, parmesan cheese, assorted meats etc and deserts - especially the tiramasu - is to die for!!
As regards cost - it is the best value I have found in Dublin. A meal for two - starter, main course, desert, litre carafe of wine and coffees - won't top €65.
Temple Bar totally confuses me so unfortunately I don't know the exact address of it but if you google it or look it up in the phone book, you will get the address. It is beside the college of photography methinks.
If you go there, have a lovely meal (the baby roast potatoes are mmmmmmmmmmmmmmmmmm!!!!!!)
Oh, and by the way, I don't work there or have anything to do with the place. In this day and age, if you find somewhere where you get value for money, you shout it from the roof tops!!!!!