What pitchers should i pick up from free agency ?(fantasy baseball)?

I did an auto draft and got some scrubs. Brian Bannister, Livan Hernanez, Edwin Jackson, Scott Baker, Cliff Lee, Carlos Silva, Joe Lieber, Greg Maddux, Kyle Lohse, Brandon Looper Tim Redding or Micah Owings are all in free agency. Im kind of leading towards Bannister or Owings. Who should i try and pick up i would be dropping Jeremy Bonderman, Jonathan Broxton or Brad Lidge. thanks