Shane is the better win. People will always know Shane, but in 20 years Margarito will be seen as a decent champ, but not a dominant one.
I'm lost there. Before the Marg win, he hasn't looked his best since the second Vargas fight. He looked better in the second Vargas fight than he did in the first. The Margarito win was still a great performance and one he hasn't capitalized on since.
I would say Floyd vs Shane was more impressive. Never did I expect Shane to get walked down like that. With Margarito having no head movment, little defense, and slow reflexes, I fully expected Manny to tear him apart. With his skill level, he doesn't no how to use his height and weight advantage properly and his jabs are weak. Tailor made for Manny.
Pacman vs Margarito. New weight division, new title and Manny weighed in as a welterweight against a Jr. middleweight who was obviously WAY bigger than him. Margarito is also a pressure fighter who went all the way trying till the end and nearly got KO'd numerous times if it wasn't for Pacman backing off. I pick Pacman's win simply because of the new weight division.