User blog comment:LordFrz/Luffy's New Bounty/@comment-1812363-20101010034217

Ace could not even touch Whitebeard. The Admirals could, which puts them at roughly Yonkou level, I'd have to say.

Luffy could probably take Aokiji now, and maybe Kizaru, but I think Akainu is still just beyond his reach.