I like your team alot, Matthews in the 3rd will be a steal come playoff time. Anyways back to the question, I would keep an eye on Simpson after his three game suspension, he has talent and Percy will draw more coverage, only question is can Ponder get him the rock down the field. I would watch the WAS RB situation, though it probably wont get much clearer by week2, and if there is a lead horse that comes out of that backfield possibly drop one of the WAS RBs you have for Simpson. I dont think you NEED to pick up anyone but I wouldnt want to be banking on Sidney Rice for bye week fill-ins if it comes to need him one or two weeks.
I drink because of the 1998 NFC championship game.
12 team big $$$ non PPR league - QB RB RB WR WR TE D K
RB: Murray, Matthews, R.Bush, D. Brown
WR: Julio Jones, Colston, VJax, Garcon
TE: Witten, Gresham