Idzik's trade of Revis was the smartest move I have ever seen. (the trade for Harvin is pretty good too, tho)
Revis, is elite. However, a corners value is over inflated. Playing 10% of your salary cap for a player that is not a QB or T, (and in some instances WR) is crazy.
Revis is coming off a major injury and has been a malcontent his entire career.
The Jets need to re-build their entire team. Best case scenerio, that takes 3-4 years of solid moves and good drafts. Given that infomation, their is no reason to keep a question mark that wants 12+ million a year who doesn't play a make-or-break position.
To get the 13th pick for a player that might not play over half the games this year, plus a mid round pick next year is genius. And keep in mind they probably would have lost him to free agency next year anyways.
New York fans might hate the move, but they are idiots, and don't understand the JS/ Ted Thompson way of team building.
As to the question of draft boards, I don't think that their knowledge will make much of a difference given where they pick in the draft. Also, the Jets play a 3-4 Defense, so their pool of defensive players will be different then ours.
The Jags have similiar needs, however, I don't believe Bradley would have been involved in the scouting while the season was going on (as he was busy actually coordinating the defence). So, will have limited knowlegde of the board.