Fantasy football running back help?

I have a big problem. I have three really good running backs BenJarvus Green-Ellis, Arian Foster, and Steven Jackson. I don't know which two to start. I'm pretty sure I want to start Foster because, even though the Texans are playing the Ravens, he gets so many touchdowns and he gets receiving yards. But, I don't know whether to start Jackson or Green-Ellis Jackson is pretty consistent and the Rams are playing the saints. But, Green-Ellis has been on fire recently and he is facing a pretty average bears defense. Please help.