Iron Man 2

It's fitting that the only album to present a balanced look at both the Bon Scott and Brian Johnson years happened to be a soundtrack about a witty, hard-living metal superhero. Going as far back as 1975's "T.N.T." and all the way up to 2008's "War Machine," this is a potent, if not volatile, collection of some of the best-loved rock 'n' roll tracks in history. Amid some of the big hits, the sequencing gives lesser-known songs a chance to shine, including "Guns for Hire" (from 1983's Flick of the Switch) and "Evil Walks" (from 1981's For Those About to Rock (We Salute You)). Whether you're an old-school headbanger or someone fresh to the scene, this is a great single-album anthology of heavy music, as done by the kings.