For a change of pace, we could go with a little progressive bluegrass: Doubting Thomas by Nickel Creek.
I'm a doubting Thomas,
I took a promise,
But I do not feel safe,
Oh me of little faith,
Sometimes I pray for a slap in the face,
Then I beg to be spared 'cause I'm a coward,
If there's a master of death I'll bet he's holding his breath,
As I show the blind and tell the deaf about his power,
I'm a doubting Thomas,
I can't keep my promises,
'Cause I don't know what's safe,
Oh me of little faith