Depends on what we do with Nate, imo.
If he stays at CB, than I think we can get away with just adding a decent nickelback in FA. There seems to be several of those available just about every year (guys like Strickland, Green, Bly, etc).
If we cut Nate or move him to FS than I think CB becomes a bigger need. Just look at what happened to us this year - we lost both projected starters at CB and have been starting our projected 3rd & 4th CB's for a number of games now.
Thank God Spencer & Brown are players, otherwise our season would likely have gone much worse than it already has. I would welcome drafting a guy like Haden if we lost Nate for this very reason.