Godsmack is always my favorite but others:
Dope
Rob Zombie
Scum of the Earth (Rob Zombies old band)
Seether
Dangerous New Machine
Primer 55
Static X
Powerman 5000
Sevendust
For cardio I like the old stuff
Aerosmith
Van Halen (old)
Motley Crue
Zeppelin
same here for lifting but for some reason hardcore techno for cardio for me