OBJ would seem to be the obvious answer.
I'd be surprised. OBJ has good punt returner talent but not kickoff returner talent. For kick offs shiftiness is not too important. You want great straight ahead speed, the ability to cut without losing speed, great acceleration, good size, and balance.
My guess is Collins, MaGee (sp), Brazil, White - in that order. That's to start the year. Brazil or White seem like the right guys in the long run - depending on which has the vision.