Daniel, I might add that you should be sure and look up some "vintage" Celtic Woman from back in their "early" years!
The Helix performance is where we all met these wonderful performers and is a classic in its own right.
This is where you get to see the true genius of David Downes bringing together such a talented group of young woman and how these ladies, with just a few practice sessions, began what has, for so many of us, been the musical journey of our lives. For me, Celtic Woman has been one of the most influential and meaningful experiences of my life. I still thank whoever was watching over me that night in March, 2005, for steering me to PBS to see the Helix performance. The rest is, as they say, history.
Many of the performances are on YouTube, but the DVD is a must for your collection. And while you're at it, don't forget to pick up their "Christmas Celebration", "A New Journey" and "Greatest Journey" DVD's. They all contain the very best that CW has to offer. Such a beautiful collection of some of the most wonderful, uplifting, and meaningful music you will ever find.
Oh, I've tried to place many of their YouTube songs on a page I created for easy reference. I have (hopefully) nearly all of their video performances referenced.
http://www.timerson.net/CW/CWYouTube1.htmEnjoy!
Brad T