5. Big Boi, Sir Lucious Left Foot: The Son of Chico Dusty
Lucious, with its swooping cadences, dizzyingly nimble rhymes, and funky, fat-bottomed Dirty South beats, isn't made 
for cheap takeaway singles (though ''Shutterbugg'' and ''Tangerine'' are why God — or Steve Jobs — invented the iPod repeat button). This is surround-sound hip-hop for grown fans with attention spans.