Whos the best pound for pound and why?

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Clearly this issue needs to be discussed again after 7/19. Everybody should give their top 3 or top 5 fighters (10 if you're bored) and a couple sentences explaining why they deserve that spot.

Remember this is a discussion of the best fighter all around pound for pound, weight classes are irrelevant.

1- Fedor. 28 wins against some of the best fighters out there, and we've never seen him dominated for more than a few seconds at a time. Fedor's wrestling is better than Silva's, just barely inching out the top spot.

2- Anderson. A damn close second. When he fights he seems to be just toying with people, even at 205 vs. James Irvin. I think he's far better at striker and jiu-jitsu than GSP and has dominated his opponents more resoundingly.

3- GSP. Probobly the best wrestler pound for pound in MMA but I wouldn't put his striking or jiu-jitsu in the top 10. GSP is awesome and very close behind 1 and 2.

I would go 4 and 5 but I can't really decide between Urijah and BJ... What are your oppinions?