For something a little darker and older, can I recommend Orbital's Tunnel vision?

http://www.youtube.com/watch?v=Be5YLJWDxLY

Other older classics that race well are funky **** by Prodigy (check out this mix with insomnia I'm racing to right now):

http://www.youtube.com/watch?v=0PjKSZ3L8E4

and Hey boy hey girl from Chemical brothers...

http://www.youtube.com/watch?v=64szVQugrAo