Jameson's the Big Daddy of Marxist theory these days. The guy's smart and wants you to know it, so don't expect him to just hand his ideas over without a fight. Even reading this introduction of this one, though, will clue you in to some mind-bending stuff on contemporary politics and society.
What do you make of the idea that Marxism is not just more theory among others? Does Jameson make a convincing case for its uniqueness?