Yea I'd try to pick up a QB.
I like Schaub personally and most people don't play him, so he'll be cheap.
Romo had a bad game, but he's typically one of the better QB's in fantasy. With Witten doing a lot better, he should be back on his way as long as his line protects him.
Stafford has also been sliding. He puts up decent games, but not as good as last year. He might be tradeable for someone else.
Ryan Fitzpatrick seems to have found his groove again, and with Fred Jackson and CJ Spiller distracting defenders, they'll be able to use play action to get big pass plays. He still has Stevie Johnson, Donald Jones, and Scott Chandler to throw to.
Eli Manning is typically under the radar as a QB. He can put up big games but is more consistent than Rivers.
I think Foster and Charles is solid. I also wouldn't trade Julio. If Ryan Williams has a big game you could try to trade him, as he is not consistent even with Beanie Wells out.