Who do you think manny pacquiao should fight next?

Well Cotto is fighting Margarito next so he may be out of the question, I think a good fight for Pac man would either be Sergio or Saul. Saul is a young prospect from mexico and has very quick hands with a fabulous. The only problem is that he is still about 20 years old. But he does deserve a chance I think, if not now then later on in his career. However Sergio has proven himself a lot the last 2 years, he took it to kelly last year and has a few KO's under his belt. I think those 2 would defiantly fit pacquiaos next fight.