Best D-line in the NFC North?

Its difficult to really compare the Packers d-line which varies in number from 1 to 4 given the play to the 4 man lines. Lets just put it this way I would take the Packers Dline and Clay Matthews over the other groups, but for just defensive linemen I would take the Lions group. Jared Allen is fine, but Pat Williams won't be with the Vikings next season and they aren't as talented as most think. Julius Peppers is fantastic, but one player can't make enough plays to make up for a lot of dead weight along the front.