Try listening to Altan, their album "Harvest Storm" is awesome. The others are supposed to be good too but that's the only one I own.
Young Dubliners album "With All Due Respect - The Irish Sessions" is good celtic rock.
The Skels album "Any Port in a Storm" is...alright. Fun now and then. I prefer traditional stuff, female vocals, but if I want to hear songs about whiskey I'd rather listen to The Skels than say...The Clancy Brothers or The Chieftains.
And Young Dubliners are not to be confused with The Young Dubliners, the later are from L.A. >:[