If you get a chance, do go up to Northern Ireland. I spent 3 days in a small town called Portrush, so I could go see Giant's Causeway. I loved it up there, and I want to go back and see more. There's also a great restaurant in town..it's one of two near the bowling alley. Anyhow...
You've got a great list! I ADORED Ireland, and I was there in the dead of winter. It even snowed one day. Enjoy your trip.