I would also suggest another day in Dublin since you'll be arriving early. I would move a day from Dingle to Dublin. I personally don't schedule anything for Day 1 since I have never been one of those 'hit the ground running' travelers. I need a day. Use the time to check out the Mummies at St. Michan's Church in Dublin.
I drove a similar route back in 2007, choosing Waterford instead of Kilkenny and we skipped Kerry Peninsula for Dingle Peninsula due to only having a week there.
Rock of Cashel is a MUST!! Definite highlight of our trip. The latest hotspot near Kerry Peninsula (from Kenmare) now is Skellig Michael because of the Star Wars films. Just mentioning because I would personally go there! But I digress. You may want to look into Doolin as a place to stay after Dingle. We stayed there for our visit to the Cliffs of Moher. They are also close to Aran Islands but from what I read in the Rick Steves' Guidebook you might be better to go to Galway as the starting point to Aran Islands. Definitely consider last night in Galway. Great city and great place to start trip to Shannon.
Biggest tip I can give you is plan your overnights wisely. We would arrive in a place, stay the night and site-see during the day and drive to the next destination in the evening. Driving at night is NOT the ideal way to see rural Ireland. Allow extra time for travel. Maybe an extra night somewhere between Dublin and Kinsale so you aren't driving at night. Happy Travels and Slainte'!