Who should i start at RB this week?

I am in the finals in my FFL. My running backs are Brian Westbrook, Brandon Jacobs who are usually my starters. Jacobs is out this weekend. My backups are Ahmad Bradshaw and Tashard Choice. I just picked him up. Who should i start if Marion Barber doesnt play because his discolated pinky toe NYG and Dallas are playing each other. With all the probems in dallas kind of hard to rely on them I would appreciate any input. Thanks