Pacquiao's best option if no PBF fight?

[CFH]

I would pick Margarito if the purse split will be 90 / 10 in Pacquiao's favor.

Otherwise, it's Cotto at 154 lbs.

Either will solidify Manny's legacy with a unprecedented title in 8 different divisions ... that is if he wins.

I don't think beating Margarito (or beating Cotto again) will do all that much for Pacquiao's legacy. Obviously it will do a little, but he's already accomplished so much and beaten so many great fighters that only a fight with Mayweather or another truly elite P4P fighter (like Paul Williams or a Sergio Martinez) will enhance it further.

No matter what, Pacquiao, unless his reputation is legitimately tarnished, will go down as one of the greatest fighters of all time.