Montero vs. Walker vs. Kottaras

[BoilerATC]

Who is the better keeper option between Montero, N. Walker, and Kottaras? Is either a strong candidate to move from catcher?
I'm fairly set at SP in my major league keepers (Johan, Lowry, Webb, and possibly Bedard/Clement), and have Weaver, Patton, Gorzelanny, and Wade Davis in my minors. Should I drop Davis to pick up Montero/Kottaras just to be safe or just stick with Walker?

[JohnR]

walker may end up getting moved off catcher (ive been hearing 3B possibly)....kottaras is Ok, but montero sure looks good....he had a good year last year too but needs to keep hitting...if he does, he's going to move up the ranks big time both on prospect charts and in the dback's eyes....

id probably say right now stick with what you got...wade davis pitched 6 shutout innings again last night and his ERA is down to 0.56 after 3 starts now....granted its only A ball, but a lot of experts predicted a breakout from him this year

[BoilerATC]

Anyone else have want to rank those three catching prospects?