Screw it. Its a 5 starter. If Wakefield is himself, Beckett, Schilling and Clement are themselves, then get a guy who goes .500 and we're good.
That said, I would probably give up Lester for him, I wouldn't give up Hansen, Pedroia or Ellsbury for him.
Hansen has the ability to be a dominant closer. He throws 98. Lester doesn't.
when I hear comparisons between lester and mulder or lester and Pettitte it makes me thing, wow, that guy could be really good. But mulder and Pettitte aren't Pedro good. They aren't Schilling good. Willis is already Pettitte and Mulder good, but he's younger.
I do worry about his inconsistency, but that is up to Theo to judge, not me.
Overall, I would give up one of our best prospects, but not more than one.