So taken your point, which would be the safer pick between Green and Fairley? I would surmize Fairley.
DT without a doubt but if I get to pick anyone at one right now it would be Peterson. I say rebuild with a strong CB in the first year cause he want commanded much money and there are better options for DT in FA. Any FA CB will be looking to bank this year. Rather spend money on a experienced DT and a Rookie CB2 then an experienced CB2 and a Rookie DT.