Before you leave Cork you could try and head for the University where, lurking in 'The Corridor of Stones'* there are a few nice bits including the only rock art to come out of Waterford. I have to nip in and find that myself next month.
There's still loads around here to be visited for the first time. Wicklow is still fairly unvisited as far as TMA goes, although ryaner is quickly getting around and getting to some good stuff.
*I don't know if that's an official name, but I've seen it refered to as that.