I also think Revis may not be what he used to be. But, I think you are right in that there may not be any real "shut-down" CBs in the league right now. Revis (like Deion) basically took away 1/4 or 1/3 of the field in the passing game. Sherman has potential but hasn't proven to be a complete shut-down player. But, as you note, Revis has consistently been there. Sherman has to prove it a couple more years. He reminds me of Mel Blount more than any CB since, well, Mel Blount. His strength, size and physicality make it very tough to get by him. He doesn't have the speed of Revis (Revis had both speed and physical strength to combat WRs). I am hoping that Jamar Taylor will get there in technique, instincts, physicality, and speed (he's pretty fast). I'd like to see us sign Grimes to a longer term deal ... But he too, though very good, is not a shut-down player. Just does not have the physical strength to be that kind of player. I hope Jordan is a top 5 at his position some day - but, he could also be a bit of a bust. Will be interesting to see him at full health. Really think he'll be a significantly different and better player next year.