One of the problems with pound-4-pound is of course that it is entirely subjective and can never be "proven" or "demonstrated". Usually pound-4-pound is done on a basis of achievement, but some people also factor perceived ability in to it. I like to use both career achievement and perceived ability into it.
My top10 P4P Boxers:
1 - Wlad Klitschko
2 - Floyd Mayweather Jr
3 - Manny Pac
4 - Sergio Martinez
5 - Vitali Klitschko
6 - Andre Ward
7 - Lucian Bute
8 - Nonito Donaire
9 - Denis Lebedev
10 - Chad Dawson / Tim Bradley / Robert Guerrero / Carl Froch / Miguel Cotto / could be any of these guys as #10
Notes.
I firmly believe Wlad deserves the #1 spot. He currently holds the status in boxing as the 2nd longest reigning champion (reign is uninterrupted since 2006), and he also is easily the most dominant champion in boxing. Nobody dominates their weightclass like Wlad does. He beat a prime elite fighter in David Haye July 2011 and that moved him to #1 for me. He also looked sensational in his KO of Mormeck. Really his entire career has been sensational.
Vitali is an alltime great, but I think we have to be honest that he is aging and on the decline. One or two years ago he would have been higher on the list.
The reason I put Ward ahead of Bute is because (much to my displeasure), I do have to admit that Ward has beaten bigger names than Bute has. however, I feel in a head-on fight that Bute would win. I also feel Lucian has an opportunity to surpass Ward by KOing Froch. Bute > Ward, he just needs bigger fights to prove it!