Cork and Kerry you say?
Iv'e just had a visit from a pal who did a tour of Ireland a couple of years ago and he spoke highly of both, specially in reference to the prehistoric remains. If they have the rock art, they start to answer the problem of which bit of Ireland to aim for in the event of ever getting there.
I'm well chuffed to learn there are cup and rings in addition to the chambered tombs me mate spoke of. Sounds grand.