They're a Finnish band that's metal-ish and dark opera. I just bought their most recent album "Once" which is supposedly one of their least metal one, since it has orchestra everywhere on it.

I have to say, I'm very impressed. The orchestra is mind blowing and the lead singer, Tarja Turunen, is amazing. She sings opera style, and opera singers are the best singers, imo. They have the most talent. They need to have wide ranges and strong voices.

What do you think of them? You can hear some clips of them on Amazon.com or their official website http://www.nightwish.com/ if you've never heard them.

I'm planning on buying their Oceanborn CD next. Any other CDs by them that you recommend?