Who should I start as my two starting RB's in fantasy this weekend?

I have Tim Hightower (ARI), Larry Johnson (KC), Brandon Jacobs (NYG). Hightower plays a weak Seattle defense this weekend. Larry Johnson is back from some tough times against New Orleans. And Brandon Jacobs, who has scored 9 touchdowns in the past seven games, faces a stout Baltimore defense. I know Johnson and Jacobs are better but Hightower seems poised to have a big weekend and Jacobs could be stopped by the Ravens defense. I have no idea who should start.