So what do you see as their ceiling? Or, do you see Buehrle as the one player who will definitely put this team over the top? This is certainly debateable, so I won't tell you you're wrong. If you don't see a long or all-star career for Ellsbury or Lester then I could see your point.
I'm very unsure about Lester's career projections at this point. I guess he feels like a #2 on a smaller-market team when he's matured, or a #3 on a well run big market team. I don't see #1 starter from him. Of course, I don't see #1 starter from Buehrle's numbers either, but his results have been pretty impressive.
someone the other day made a comparison between Jacoby Ellsbury's plate approach and Derek Jeter's. While it is obviously very early to talk about ellsbury's career, I think that a player like him can turn into that cost-controlled mainstay for a generation of Red Sox. He has the charisma and flare that guys like Pedroia and Youkilis don't entirely have. He will quickly become a fan favorite and will provide years and years of runs and solid CF play if he sticks around. That's just my two-cents.
I understand the inclination to get a guy like MB. He's a great pitcher and could certainly put this team over the top. I just think one has to be very careful when trading away the top, most develop prospects in the system to make that happen. Getting to the playoffs is the hardest part, winning in the playoffs often comes down to how the team is playing when they get there and how the ball bounces in those particular games.
I would be inclined to try to get Buehrle with a couple of guys like Lester, Brandon Moss (who won't really get a chance in Boston anyway, but who has had 2 really good milb seasons), Aaron Bates, Lowrie, Craig Hansen, possibly even Manny Delcarmen.
Of course, a guy like Coco Crisp may be able to fill a big part of a deal too with his recent resurrgance.