Who to start week 10 fantasy football at rb? jamaal charles vs oak or mcfadden vs kc or kevin smith vs min or?

need some help...need to pick two: jamaal charles vs oak, kevin smith vs minn, hightower vs seattle, mcfadden vs kc, mike bell vs stl...also r those of u with megatron starting him this week? I have fitz vs seattle, marshall vs was, sims walker vs nyj, gates vs phi, maclin vs sd, megatron vs minn, chambers vs oak. I need 2 rb 2wr and 1 flex....I feel like im very thin at rb...should I trade to get somone better? any recommendations? who should I start at rb and at wr? thanks 4 any hlp