Which position is best outside FA option for Bengals?

[*ochocincos*]

As we approach the inevitability that the Bengals will miss the playoffs and pick in the top half of the draft, everyone will have their opinion of who that first pick should be.
What hasn't been discussed much is what position(s) could the Bengals instead address in outside FA so they don't have to use as early of a draft pick?

Upcoming FAs at a particular position can be viewed at http://overthecap.com/free-agency/

I'm personally expecting it be at either OT or WR. And I don't think the Bengals spend more than $6 million on whichever FA they bring in unless they don't re-sign (at least) one of Whitworth, Zeitler, or Kirkpatrick.