He's only a cornerback, and would be too expensive for what his true value actually would be. We have much more immediate needs on this team such as nose tackle, possibly right tackle, center, wide receiver, and then cornerback. We can improve in the secondary for sure, but don't need to break the bank for one, honestly.
I used to really think elite corners were important, and certainly if you have one, it's a nice thing to have. But, the more I watch the really good defenses, the Giants of 07, last years ravens and Steelers, and titans, etc. they all have one thing in common. Decent corners for sure, and in the case of Baltimore, Ed Reed who's like from another planet, but what really makes those defenses great is:
1. You can't run on them
2. Disruptive at the line of scrimmage with their tackles and ends. In particular, their tackles. Albert haynesworth, Casey Hampton, Haloti Ngata anyone?
3. Incredible pass rushing and run stopping linebackers
The secondary is good, but probably looks better than they actually are because of the above 3 points.
