Readers Poll: The Best Prog Rock Bands of All Time

Three years ago, Dream Theater released a compilation entitled Greatest Hit (...And 21 Other Pretty Cool Songs). The title refers to the band's 1992 single "Pull Me Under," which hit Number 10 on the Mainstream Rock Track chart that year and actually received some airplay. For a prog rock band – especially one that started in the mid-1980s– that's an amazing feat. They never repeated it, but the band's army of fans couldn't care less. They probably even prefer it that way. Led by guitar god John Petrucci, Dream Theater play to gigantic crowds that regard them as the only band that matters. Beloved drummer Mike Portnoy left the band in 2010, but the band soldiered on and are releasing a new LP in September.