Since I know Marvin reads the Cincy Jungle and takes some of our suggestions into account when putting together his game plan I wanted to give my 2 cents. :-)
I think the Bengals should consider starting Brian Leonard. He is a strong runner, a strong blocker and provides a legitimate receiving threat from the backfield. The Bengals can't afford to risk the Benson fumble bunches and Scott is averaging less YPC than Benson. Peerman is unproven at this point.
I think Leonard would provide more production from the RB position and I think he would make Dalton more comfortable. We have seen countless times over the last several years that Leonard runs hard, catches everything, is always in the right spot and just makes big play after big play. I'm not a big advocate of changing things up in the playoffs but given the lack of production from the RB spot I think its a risk worth taking.