Progressive metal topic

Progressive metal (often referred to simply as prog metal) is a sub-genre of heavy metal music which blends the powerful, guitar-driven sound of metal with the complex compositional structures, odd time signatures, and intricate instrumental playing of progressive rock. Some progressive metal bands are also influenced by jazz fusion and classical music. Like progressive rock songs, progressive metal songs are usually much longer than standard metal songs, and they are often thematically linked... full article at wikipedia