If I were you, I think the best course of action would be to look for a middle tier infielder with speed. You have a couple guys who will have decent SB rates, but don't really have any burners in your everyday group, and with guys like Manny and Lee in your outfield, you probably won't be able to use your bench to make up enough of the difference. Think someone like Chone Figgins here. Having Martin at C is a nice speed advantage, but it won't carry you.
You'll be fine in average, and R and RBI are tougher to predict, but you don't seem deficient there. You have lots of power in your outfield, and might have just enough on your infield. Whose available on the wire? Is Mark Reynolds out there? I'd take him if I were you and drop maybe Burrell. Similar players, but at least Reynolds is an infielder. Drew will be a big help, its hard to see Escobar being that useful long term, he just doesn't run enough, though maybe he has some hidden power upside still in there.