Runningback and receiver help for week 15 playoffs?

I am starting AP and charles at RB and am wondering which other RB i should use in the flex spot from justin forsett vs. tb, julius jones vs. tb, quinton ganther vs. nyg, chris jennings vs. kc, or arian foster vs. stl. For my two receiver I am definitely starting welker, but out of holmes vs. gb and bowe (back from suspension) vs. cle who should i pick.