Question for the Pacman fans

[Rantcatrat]

It's not certain, but Pacman probably will win his next fight. If and when that happens, Pacman will have beat every opponent at or around his weight managed by Top Rank, and he'll be forced to look elsewhere for a fight (Chavez is signed up for a fight in December and if he wins, he is in line to fight Cotto). Assuming Floyd is unavailable, who should Pacquiao face? He's in a position where he will have to fight someone who is a bit riskier than his previous opponents. This is no slight on his choice of opponents because they definitely were elite fighters, but Cotto, Hatton, and Margarito had been previously knocked out when Pacquiao faced them. I don't want to turn this into a debate about Pacquiao's legacy because I give him the utmost credit, I just want to hear from his true fans on who they think would be the best fight for him to cement his place among the all-time greats in boxing history. Bradley/Alexander winner? Shane? Berto if he wins? Martinez/Williams winner? Khan/Maidana winner? Marquez? At what weight?

Me personally, I would like to see Pacquiao fight Martinez.