These guys have been really on fire lately on they're 2015 tour. You could consider them a JamGrass band. The live performance along with the light show has been really quality. Many great covers and extended originals. Go see them! http://greenskybluegrass.com/tour/
https://youtu.be/zH0HAppQt78?t=15m12s
My son loves them! They are to him what MMJ is to me. He went to both shows in Chicago New Year's weekend said their opening band "Nicki Bluhm and the Gramblers" was also fantastic! They are definitely on my list to see this year.