Baxter/Brown looks like a possible very solid platoon to me. Baxter has very good on-base skills and is an above average runner. He could probably lead off in a pinch, as could Cowgill.
Duda to me is the huge question mark. How much will he hit? Will he hit enough? Will his defense be better in LF as opposed to RF?
We could always go after Ellsbury or Gomez next year, and I doubt Gomez gets as much as Bourn, even though he's younger and has a higher possible upside.