The power behind that music comes from satan, and what I hear you saying is the world can offer you more than God.
Really? I though the power came form the grudgey bass, the screaming guitars and thundering double bass pedals :rolling
I am very open to listening to Christian bands, i listen to them all the time, however i listen to others more. God can offer great things but it is up to Christians to get off their rear and play some good music (good to me and the rest of the Nu Metal crowd) Until that time i will use the worldly music as a pacifier.
Edit: Strangely enough, bands like Slipknot actually make me feel good and relaxed, not angry or sad.