im not exactly an expert on metal, but if you read revolver, you can find some good bands. Some i reccomend
Trivium
Pantera
BLS
SAOD
Mudvayne
Slayer
Anthrax
Bullet for my valentinte
lamb of god
drowning pool
disturbed
fear factory
godsmack
incubus
in flames
korn
MSI
Rob Zombie
Rammstein
skindred
slipknot

all i can think of now