I've heard rumors that the Cards are getting closer to signing Cora. I'm not sure how legit those are, I've only seen them at other Cardinal forums.
Anyway, if they do land Cora would he be a better fit at SS? I don't know much about him. I do know that he's a very good fielder but does he have the arm strenght issues of Eckstien? That appears to be the only thing holding the enthusiasm on Eckstien in the field from what I've read.