Who's Next, by The Who (1971): If all albums that arose from the ashes of a failed concept album were this good, the world would be a hell of a place. On the heels of Tommy, Pete Townshend envisioned another concept album, called Lifehouse, a sprawling sci-fi tale of music in a future society linked together in something quite like the Net. The project fell apart, but several of the songs initially meant for it made their way to this album. Although best known for the two classic rock staples that bookend it - "Baba O'Riley" and "Won't Get Fooled Again" - there's an awful lot of excellent stuff in between. Including my personal favorite underrated Who tune, "The Song Is Over." A classic.