Hm, on the one hand, Yoruichi has *crazy* speed. On the flip side, Boa's one of the stronger Haki users, plus the turn-to-stone ability is nasty as heck...
NEP
NephthysThe Gr8est!!!!!!!!
IIRC, Hancock has also been calced as having crazy speed. Don't quote me on that though, its from Narutoforums and they mess up occasionally.