Thief in the Night by Kevin MacLeod
Laid-back, grooving, and cool. Did I mention cool? You need a cool piece. That is a statement you NEED a cool piece. Lucky for you, this IS a cool piece. Super clean production will allow this piece to fit into most things. I'd personally use this piece for a super badass character. You can download this in uncompressed format here. Download comes with individual tracks so you can make your own mixes.