I will also ditto the comments on Kinsale. We stayed there one night on our recent trip - a gorgeous little harbor town with great seafood and a brewpub (supposedly the only pub in Ireland that doesn't serve Guinness).
I had read online that the course was closed, but we drove down to Old Head to have a look. I was hoping to be able to walk out to the lighthouse and take a look at the course, but we were stopped by security at the rather imposing gate. The security guard was very nice in turning us away, but I was more than a little put-off by the fort-like wall across the penninsula, complete with barbed wire that extended down to the cliff sides (as if they needed protection from the dirty masses of golf course nuts that might try to gain access to the property by braving the 200 foot cliffs).
The scenery is extraordinary, though, so I suppose I will try to play it some day. It is a bit of a drive from the other SW Ireland courses - on my next trip I plan to concentrate on the coast from Lahinch down to Waterville (Lahinch, Doonbeg, Ballybunion, Tralee, Dooks, Waterville).
Andy