I wouldn't mind an old seasoned DC...But will admit I would want one that acknowledges some things just don't work against modern offenses. I don't think Leavitt is out of touch or "old" just yet.
Why not Jim Leavitt
I also like Glenn Spencer, and I believe he runs 4-2-5 concepts. Had scraps to work with this year at USF, but has had excelellent improvement and results everywhere else.