I must have spent the best part of 2 hours on Friday night trying to figure this one out with a couple of the guys i went to the night with. Had definitely heard it before and it was driving me crazy.
Finally got it this morning though, the track is:
http://www.youtube.com/watch?v=LriB-GwI-PM
Bit disappointed i didn't get it sooner, loved this one!
Can sleep peacefully now