I'm leaning towards Davis even though he plays the Eagles D.
Droughns SHOULD start and get 25+ touches, in which case I would start him, but Shanahan will split carries with Q. Griffin.
My delimma is will Droughns have a better chance to score TDs than Davis will? My league only gives 1 pt for 20 yards rushing so TDs are the most important thing. Droughns will get the goalline touches over Griffin, but may not get that many yards.