I think there are several RBS in this draft that are interesting. Jacobs I am saving my.conclusion on until we see hard numbers... because there are zero numbers. I find it interesting you like Jacobs but your major issue for Metcalf is his lack of production. I question both players for that very reason. If the guy above me passes on Jacobs it may be tough to pass on him at 1.3...
As far as Sanders and Henderson go... I dont see either being stud RBs in the future, but the most likely to carve out an NFL RB1 nitch are Sanders, Jacobs, and Henderson. Montgomery maybe too... he is probably the most complete of all of them, hes just slow. I think they have a shot at being high end RB2, low end RB1. I need them to be my rb4 assuming Guice pans out. I wouldnt consider taking them until my pick mid round 1 or high round 2.
Sanders and/or Henderson could slip to round 4. If that happens they could fall in rookie drafts too. They are the most intriguing RBs for me. I wont reach on them, and I may just pass and load up on wr yet. I think a lot will work it's way out when the draft is done and we see went where.