Buchholz had what, 3 starts in Boston? He's got a huge amount of talent, and in 3-5 years could very well be a Cy Young pitcher.
Lester is also a great young prospect. He didn't do great this year, but hell, he only played half the year after coming back from CANCER. He's a quality starter.
Trading away 2 young promising prospects for one all-star doesn't seem like the best idea. It's like pulling a Yankee. Look at some of the bigger name guys we've brought in.. Renteria, Drew, Crisp, Lugo... those worked out well.
Hell, we traded away a pitching prospect (Kason Gabbard) to get Eric Gagne. That should speak for itself.
Now look at what we've gotten out of the farm system:
Papelbon, Youkilis, Pedroia, Ellsbury, Delcarmen, Lester, Buchholz.
There's no guarantee Santana would even do well in Boston. I mean, look at Gagne. Buchholz kept his cool in the 9th inning at Fenway when he was throwing a no hitter. These guys have already proven themselves.
A-Rod is not going to come to Boston. If he leaves NY, it will probably be for LA or Chicago. He doesn't want the pressure of playing in Boston, and the fans don't want him.
I think, and really hope that the Sox will re-sign Lowell. He's finally settled in to Boston and just had a career year. He's pretty much the MVP of this team.