How I rank them:
1. DRC - He will be the best CB in the draft class. I have followed his progress all year, and he is that good. After the combine, in which he will run a 4.30 or lower, and have at least a 42 inch vertical, he will be the consensus top CB
2. Leodis McKelvin - He is athletic enough to also put up a great combine. He has the best hands of the 4, and his punt returning abilities are better than anyone in this class. He is also very polished in man to man.
3. Mike Jenkins - In stature, he is the most gifted of these four. IMO a reach in the first half of the first. Doesn't have the awareness you'd look for, but definately an NFL starter. Technique is great, and he is very versatile, but also a natural at the position.
4. Aquib Talib - A great shutdown player in college. I think he has the frame to add 15 or so pounds. He is a great press corner, but his speed isn't much to be desired, most visible when up against deep threats, of whom the majority burnt him. Very polished technique and good hands, but wasn't thrown at much in college, which I see as a negative.
From the Saints perspective, at the minute, I see them having
1. McKelvin
2. Talib
3. Jenkins
4. DRC.