Maybe it's a bit silly calling this one of the greatest albums of all time, here in 2009. As if this weren't already a scientifically-proven fact. After all, how many records has it broken/held? How many widely-viewed best-of-all-time lists has this album made?

Pink Floyd perfected the art of the concept album, and Dark Side is definitely the masterpiece. Other strong cuts include Wish You Were Here, the very underrated Animals, and of course, The Wall.

Roger Waters, the group's eventual driving creative force and frontman (until he left the band), was just then coming into his own during the making...