Cad Bane has to be the baddest bounty hunter ever. It might be interesting to see him and Boba (or Jango) Fett go head to head. I suppose that Fett might have the edge when it comes to raw firepower and physical ability, but Cad Bane is (in my opinion, anyway), the superior tactician, and far more subtle until it comes time to bring his plans to fruition.
Plus, Cad is just cool-mean. He looks and talks like something out of an old Spaghetti Western. And both Boba and Jango died in really wussy ways. (Even after George Lucas said that he regretted killing Boba Fett off so easily, once he learned how much the fans liked the character; He had a chance to correct his mistake, killing Boba by proxy in the person of Jango, but Boba's clone-father's death was even LESS satisfying!)