Here is a song from one of my favorite a cappella groups - what a beautiful rendition of Psalm 63, Better Than Life…
http://www.youtube.com/watch?v=Qv5zZOnQ654
Create in Me a Clean Heart, O God…
http://www.youtube.com/watch?v=P3AUQnko9sY&feature=results_video&playnext=1&list=PL1C5C4E943C956124
This is one of their older songs based, of course, on the story in John 4, He Gave Her Water…
http://www.youtube.com/watch?v=h2AQi4CjXVk
Holy God was offered for us, so that we might become His Righteousness…
http://www.youtube.com/watch?v=fZ-fMPG0ByE&feature=related
This is one of their older songs, a Spiritual, View That Holy City…
http://www.youtube.com/watch?v=LT1irEoPVN8&feature=related