Peter will never have the foot speed to catch Wladimir with a good(legal) punch. He is too short, and too slow with his feet, and trying to keep up with Wladimir will tire him out too much. Peter has good hand speed for his size, and he will dominate Chagaev, Rahman, Briggs, and anyone else who can't him away because he is so strong, and still like I said quick enough on the inside to land on any current heavyweight IF he can get in. Anyways thats how I see the heavyweight division
Klitschko(Wlad, and probably his brother)
Peter
Chagaev
the rest