@sharingan_eyes: ichigo is a non factor. ichigo is the hero of the show- nobody wants him to die yet. beside , nobody beats byakuya in a fight(manga) beside ichigo . if you put ichigo againts kakashi - im pretty sure ichigo can beat kakashi in a heart beat.
@GIRUGAMESH: can i ask you " whose smarter Naruto or Neji " and there's more fight like that experience vs genius. so i have to disagree to you. experience > intelligence by not that much , its like putting a guy with full of knowledge in boxing without experience against an experienced boxer in a ring.
im still going for byakuya since his way faster , powerful , have more experience.
(PLUS) it will be over in a second since there is no moral and no prep. byakuya does'nt need his bankai actually.