Who is the definate #1 CB in the Draft?

if u want to go with versatility, someone who can play multiple positions (CB/PR/KR), I'd go with McKelvin. His ability to catch the ball has been questioned, but that can be taught. He has good press and off-man coverage skills and he had 7 kickoff returns for touchdowns in his college career (one shy of the NCAA record by the way). Some may also question his level of competition, but I'd love to have a guy who was coached by the same coordinators that has given the NFL Osi Umenyiora and DeMarcus Ware (both Troy alumni).