I think hotels everywhere are really expensive now. More in the 275-300 euros range. We've stayed at Buswell's right near St Stephan's Square, and it's lovely. I think Albany House also looks very nice. We stayed at Eyre Square Hotel in Galway.
What we regret is after touring Ireland, we returned for a one night stay in Dublin, before our departure back to the US. Looking for a less expensive option, we chose the Holiday Inn Express/City Centre. The Upper O'Connell area is functional big city, not charming. The Holiday Inn itself was perfectly acceptable with a modern updated room, until we found out at 10pm that there was a disco underneath the hotel, not affiliated with the hotel. Never had a worse hotel experience. And the non disclosure really was unacceptable.