I love this folky-orchestra group because it has this really fantastic combination of meaningful lyrics and beautiful orchestral instruments. I've heard that the number of band members on stage can range with each show, rendering the sound of each show unique. Their music contains instruments like guitar, violin, cello, French horn, tuba, and I'm pretty sure there was a glockenspiel at the show I attended last winter.
Here's my poorly recorded video of favorite song (sounds good though!):
Here's a great song from their newest album A Church That Fits Our Needs to illustrate their current sound: