While neither Tyson Chandler or Nene have been NBA all-stars, both are impactful Centers, and arguably the two biggest free agents of 2011. If you were an NBA GM, who would you take? Both are 28 years old, physically imposing on the floor, and when healthy, are two of the most productive Centers in the league. Simply put, they are winners. Nene is a great offensive player, while Chandler is one of the best defensive players in the league.