JUCO CB's and DT's are freaking gold.
Normally, these guys are burners or giants that are just too academically challenged to make it to D1 to start with.
Our success rates with JUCO CB's and DB's are high. I'd take two of each every year, minimum. There's little need or incentive to even go prep. We normally get better athletes from the JUCO ranks at these positions.
Ask yourself who the last, great KSU CB was that we recruited out of HS. Hell, ask yourself who the last solid starter was.