well I like slipknot and system far more than nightwish but they are a... whats the word? "dark rock"?.. idunno, dressed in black from Finland, the vocalist has a great voice.
Anyway, I really love SlipKnots new songs Duality and Pulse of the maggots and also the older system songs Forest and Chop Suey.. the best part is that I shall get to Copenhagen in about 1 and a half week and see SlipKnot and Metallica live
SlipKnot > System of a down > Nightwish