Los Angeles has Kobe Bryant and Blake Griffin. Miami has Dwyane Wade and Hanley Ramirez. Maybe Washington, D.C. will even get in on the act with Alex Ovechkin and Stephen Strasburg.
But if you're talking about the sheer exhilaration of watching two highlight-worthy athletes, Barcelona may rule the world. When it comes to Lionel Messi and Ricky Rubio, just edit highlights, add music and you've got instant goose bumps.