NEED HELP!

[DET Sports81]

I'm in a 12 team standard scoring league, I start a QB, 2 RB's, 3 WR's, 1 TE, 1 K, and 1 DST... I had pick 10, and ended up with this team:

Joe Flacco (Hasselbeck)
Deangelo Williams, Shonn Greene (Leon Washington, Michael Bush, and Larry Johnson)
Randy Moss, Steve Smith (CAR), Hakeem Nicks (Jabar Gaffney, Mike Williams (TB), and Nate Washington)
Visanthe Shiancoe (Jermaine Gresham)
Rob Bironas
Philadelphia DST


I was wondering if there is anywhere I should maybe trade up to strengthen, I feel like my Rb's are a little weak in depth, and I'm not sure who to trade.