Guerrero or Michael Young for Strasburg?

I'd be trading Strasburg...My 3B is Aramis Ramirez, so an upgrade at this point is an obvious need. I have Callaspo so I'm not sure Young would do a ton more for me except that he is more consistent. Guerrero is the 5th ranked player in Yahoo right now and his career numbers show he is more than capable of continuing what he has been doing. Would you sell high on Strasburg or do you think he will be as good as expected in the Majors?