Dubbed "the Mixtape Messiah," Houston's Chamillionaire arrived late as a major-label artist during his city's 2005 takeover of mainstream rap -- the Top Ten Sound of Revenge, released during November that year, followed albums from Mike Jones, Slim Thug, and former Color Changin' Click partner Paul Wall -- but he had already built a loyal following outside the South and received significant print coverage. Through a prolific succession of mixtapes, Chamillionaire (born Hakeem Sediki) became known for his deep, versatile voice (he sings his own hooks very effectively) and lyric...