Just a suggestion, but if you are not getting enough response, try the search function for each of these names to get historical opinions. While you are doing this, I'm sure the responses will start to roll in.
I am also keeping an eye on these guys, but not ready for them yet.
Ledezma has potential, but I stay away from Tiger pitchers due to the poor defense behind them.
Backe I like better.
Rusch I like the best, but he is a 5th starter in the Cubs rotation.