I've always felt a Pacquaio-Mayweather fight would work. They wiegh about the same walking around, Pacquaio is a great offensive fighter, and Mayweather is a great defensive fighter who doesn't use size as an advantage when he has it. I think it would be a great fight, especially because Mayweather does not do well fighting southpaws... He tends to come forward against them and that plays into most southpaws advantage.