Floyd "No testicles" Mayweather hand picks his fights obviuosly! Is JMM good? absolutly but he's naturally smaller. Floyd is one of these types of guys who likes to compile a lot of big names on their resume but arn't the top notch challenges. Pound for pound I think JMM is every bit as good as Mosley and Cotto but for Mayweather to say he's the biggest challenge, he's gotta step up to the plate! Floyd vs Shane would be tricky. Mayweather might be the more "on target guy" but I don't think he would be able to keep up with Mosley's work rate (A big reason he should have lost to Castillio, and a reason he may lose to JMM!) The great thing about Pacquiao now is that he has as much pulling power if not more than Mayweather, so Mayweather might have to come close to 140 for Manny to fight him! I love the 130-147 weight ranges right now, probly loaded with its most talent in history and so many fights to be made!