Brian Westbrook or Larry Fitzgerald?

Take the running back. Not only will Westbrook will be projected a top-5 pick next year while Fitz will probably be outside the top 10 (or possibly right around 10), but loading up on RBs is still the way to win fantasy titles. Unless your league rules would force you to sacrifice draft position in order to keep Westbrook, hang on to him until you have another stud RB to keep instead.