I've always like Techno, and the more electronic version of Hip Hop, as opposed to the P Diddy type - I've GOTTA be able to pump iron to it!

In no particular order;

90's:
The Prodigy;
The Chemical Brothers (NOT their Trance stuff, however!)
Fatboy Slim - the man is a genius;
The Wiseguys.
NWA/Ice Cube

Old Skool:

Public Enemy;
Mantronix;