Despite Mr. Kasual's pic of the honey with the bangin' booty, I vote Urban Spirit.
That crystal clear beat is nice, I think the piano needs reworking, I'd offer a suggestion, but I don't know music notation, so, uh, add the appropriate two notes to the second part of the piano loop.
Kas' beat had a good subterranean-sex-vibe base, but it needs a topnote to finish it off