Here are how three major services rate the top defensive ends available in April's Draft.

ESPN.Com
1. Mario Williams (North Carolina State)
2. Tamba Hali (Penn State)
3. Quentin Moses (Georgia)
4. Mathias Kiwanuka (Boston College)
5. Kamerion Wimbley (Florida State)

NFL.Com
1. Mario Williams (North Carolina State)
2. Mathias Kiwanuka (Boston College)
3. Tamba Hali (Penn State)
4. Darryl Tapp (Virginia Tech)
5. Manny Lawson (North Carolina State)

CBS Sportsline
1. Mario Williams (North Carolina State)
2. Tamba Hali (Penn State)
3. Mathias Kiwanuka (Boston College)
4. James Wyche (Syracuse
5. Parys Haralson (Tennessee)