One week, Dublin to Belfast (clockwise)

Planning one week tour of Ireland, Dublin to Belfast. Would really appreciate opinions/advice about the following itinerary. (I've been to Dublin before, so don't need any time there). What have I missed? Good places to visit along the way?

1. Arrive Dublin airport late afternoon. Drive to Galway. Overnight: Galway.
2. Day trip to Inis Mor. Overnight: Galway.
3. Galway to Derry, via Westport (?), Donegal (?), where else (?). Is Galway-Derry in one day manageable? Overnight: Derry.
4. Walk the walls in Derry. Drive to Antrim coast. Overnight: where?
5. Explore Antrim coast, drive to Belfast. Overnight: Belfast
6. Explore Belfast - where to go? Daytrip to Mourne Mountains?
7. Explore Belfast - where to go?
8. Depart Belfast airport.