Thank you Michelle & everyone else for your valuable feed back - based on which I have come up with a tentative Itinerary - still have some loose ends - Please take a look at it & give me your suggestions.
I have 11 nights in all - just realised I have en extra night:
Day 1& Day 2 - Arrive in Dublin- spend the 1st & second nights in Dublion & explore the city & surroundings. Planning on staying at Andorra B&B
Day 3 - hire a rental Car & drive out of Dublin - not sure where to spend that night onway to Killarney - want to see RockofCashel & Cahir Castle ...or any other must see place on way to Killarney - thinking will spend thenight at Killkenny or Blarney - notsure - Please Help !!
Day 4 - Drive down to Killarney & spend 3 nights here - to cover all the major attractions aroundhere at a leisurely pace - Please suggest B&B here.
Day 7 - Drive out to Dingle - spend 2 nights either at Dingleor ENNis - based on which is a better place with access to all the major attractions - want to do Cliffs of Moher, other attractions - please suggestwhich is a better place to spend 2 nights - Dingle or Ennis.
Day 9 - Drive down to galaway - spend 2 nights at Galaway -Please suggest B&B or hotel here.
Day 11 - drive down to Dublin - spend a night near the airport - as we have a flight at 8:00 am the next day.
Please let me know if we are missing anything for a first timer in Ireland - things that are a must see.
I don't like Dingle so would just drive round the peninsular to see the good bits like Slea Head and Connor Pass and head for the Fledh Nua in Ennis which is a great base for South Clare including Loop Head and Carrigaholt up to the Cliffs with Bunratty and Lough Derg region in the other direction.
You can see the Cliffs of Moher on the drive from Dingle to Galway. You can also do Dingle as a day trip from Killarney. That gives you some more options to think about.
As I mentioned in your other post (maybe best to keep them all together?) Day 3 in Cashel.