RB and Flex Issue

So I am having a issue with my flex and 1 RB spot on this weeks roster…

So I have Gurley and Coleman as my RB options to fill my last RB slot.

And I have Robert Woods and Emmanuel Sanders for my flex spot… but this also takes into account who ever I am not starting in that RB slot as well.

I think its a toss up but want to see what you all think