Mudlark, definitely go and see them.
Also, seee if you can find out where they will head to AFTER their concert. Here in Halifax they were here for St Patrick's Day weekend. After they finished their show, they went to another Irish venue, and partied there with the musicians after close, well into the dawn. Monday night they did the same, and I believe they were there until 5AM Tuesday morning.
Needless to say, book the next day off before you go. 8-)