BJ Penn -If he moves up to fight GSP at welterweight, he's going to lose this fight because he still doesn't have the same strength and conditioning that GSP has. GSP has also been improving rapidly in skill. The only way that Penn takes this is if he gets to ref his own fight like he did with Sherk. -If he stays at LW I think eventually a fighter like Florian or Tyson Griffin will just outwork him for 5 rounds. I also think that he beats most if not all the LWs for the most part, but from the Sherdog radio interview and other interviews it sounds like he is already making excuses for being lazy if he has to stay at LW. GSP -At this rate, I don't think we are going to see a welterweight that can compete with him in terms of skill and athleticism for awhile. That being said, I can see him get TKO'd again in the future by chance. Fitch could do it, Alves might although I doubt it, I think Koscheck stands the best chance. -If he moves up to MW to fight Silva, I think that fight is 50/50 for both of them. Anderson definitely has better striking, but GSP's wrestling is what closes the gap. Anderson Silva -Short term, I think maybe Yushin Okami could beat him or maybe Nate Marquardt but it would be a bit of a long shot -Long term, one of the BJJ wizards at MW is eventually going to work his way to a title shot and probably beat Silva. Guys like Ricardo Almeida, Demian Miai, and Palhares all stand a good shot against Silva.