My two cents:
Go get Mark Teixeira....all prospects are available except for Clay Buchholz. Jon Lester, Michael Bowden, Jacoby Ellsbury, Kevin Youkilis, Coco Crisp, Wily Mo Pena, Craig Hansen....whatever. If they make a mistake with a few of those prospects....no big deal because we get Mark Teixeira. By the time he becomes a free agent and we possibly loose him, we will have other prospects we will be talking up. More options will arise and the Red Sox will move on.
The only reason I don't want to give up Clay Buchholz is because I have seen him pitch and understand his "stuff" is dominating. Some guys don't work out but he has a great chance of being an ace. Imagine what he will look like when he fills out. That 92-95 MPH fastball may pump up to 95-97 MPH. His change and curveball are probably the best in the system. In fact I think his curve is on par with Josh Beckett's. He may have the best change in the entire organization (although I'm still intrigued by Dice-Ks if he would use it more). I'd love to see the kid develop a splitter.