Irish Internet Radio and TV from Dublin, Ireland.
Not bad! Spencer the Rover is really lovely by him! :-)
Dervish is number one for me. I have heard them twice here in California, and both concerts were superb. Close contenders are Altan and Solas. In addition, I listen to a lot of Loreena McKennitt, Lunasa, and the Corrs when they do the more traditional material - especially the live acoustic versions.
Brigids Cross (Ohio) Flatfoot 56(Chicago),Enya and Celtic Women !
I know they're not together any longer but my long time favorite has been Planxty