I stayed around Baggot Street a few weeks ago. A great location, there are great pubs and restaurants and it's just a few minutes' walk from Trinity College.
I can recommend Dohney & Nesbitts pub, a very traditional pub and great fun and then across the street is Toner Pub, different crowd, but again traditional. Stayed in Baggot Court Townhouse and then for a change moved to Fitzwilliam Square and stayed at Fitzwilliam Townhouse, great places to stay, Georgian buildings and, most of all, good value.
www.baggotcourt.com
www.visitdublin.com (see bars)
www.fitzwilliamtownhouse.com
www.bangcafe.ie