I found Sons of Korah on a discount table at a local Bible bookstore.  I was intrigued by the idea that the entire Psalm was put to music.  Every song is a Psalm.  I listened to their testimony on one of the CD’s I have, they try very hard to really put the Psalm as close to how it would sound in the time it was written.  I admire their ability to put the listener in a spirit of worship and humility.