If Rios comes in his fight vs Gamboa not weight drain then easily i'll pick to watch that fight over Floyd vs Cotto, Pac vs Bradley.
1) PBF- Cotto . . . if you are pumped for this fight you are either a hater or not a fan 2) Gamboa v Rios . . . very intriguing match-up; can Gamboa carry his power and speed up two weight classes? Will Rios weight problems finally catch up to him. AT face value Rios style and Size is all wrong for Gamboa . . . but we might be seeing the next stages of the p4p king if Gamboa can win. 3) Pac . . . love pac, Bradley does not stand a chance because he has no power, not a naturally counter puncher (like JMM and PBF). Pac' success is actually working against him in this instance.
Rios vs Gamboa and not even close. Both in their primes, both beasts, and despite having different styles they both have KO power. I think both in the not to distant future will want a crack at the Pacquiao or Mayweather sweepstakes.