I have never been the biggest Calzaghe fan but if he beats Mikkel Kessler, then the Pavlik vs Taylor winner, and then Chad Dawson I will say he is the best fighter of this era. And the only way Mayweather could enter into the argument is by beating Hatton, the Cotto vs Mosley winner, and then Paul Williams or Margarito (not De la Hoya II)