I think most Sox fans think they will fall back a bit this year, and TB, Bos and NY will vie for the division title in any order. NY obviously just scooped a ton of talent so we'll see how that works out. We'll also see if Tampa keeps Price or moves him for prospects. But as always, they are a very well run organization and will compete. If I had to guess now, I'd say Tampa and NY going for the title with Boston for 3rd, but who knows.
As for Boston, you're right, last year was magical. But it's a new year now and there is a transition to the bringing up some of the great talent they have in the minors. MLB.com just rated them the #2 farm system with the most prospects in the top 100.
I expect them to extend their own guys (Lester and Ortiz) and keep big money out of the FA market unless a really good player in his 20's comes up at which point they'll be in great position to pounce.