Fedor is still #1 at this time. There are a few up and comers that look to have promise. Hardonk impressed me for sheer raw talent in his UFC debut. He has size and looked very sound in striking. Cro Cop of course has a chance even though he has lost twice before to Fedor. Fedor's brother, Aleksander, looks pretty sharp but I doubt we would ever see the two fight, and if they did my money would be on Fedor. Many people don't care for Tim Sylvia but I personally believe he could beat anyone on a good night. Tim has to cut weight to make the 265 lb limit and he stands 6'-5" or so. Anyone that big who possess's the power and determination he has is a dangerous fight for any heavyweight, including Fedor. Then you always have tried and true veterans like, Barnett, Noguiera, Monson-who I'm not overly impressed with and Arlovski. I'm sure there are other's but I simply can't think of them now.