No doubt in my mind that it's going to have to be Warheart.
The first time I heard that song it totally blew me out of my fucking chair, I was over at a friends house and he had recently purchased some album for cheap. He was always getting into metal bands, so I checked it out... It was totally killer.
Needled 24/7 kicks a large amount of ass, but Warheart packs a bigger punch.