Paul,
At QB, gotta play the match-up and hot hand here. Flacco is hot and playing the Browns......Palmer had a nice week 2, but is playing the Steelers who give him fits. Take the safe bet and go with Flacco.
RB's: You drafted Turner for a reason, start him! For RB2....man gotta say I know why your stuck, tough call here. I like Benson, but not the match-up this week...Jones also has a tough match-up vs Tenn. Caddy is better in ppr leagues, but has been solid and Parker and the Pitt passing attack have been very bad and the bengals D better than expected....yuck. If I had to pick one I'd roll the dice with Caddy due to him having the better match-up for run D's.
Wr's: Gotta stick with Boldin and Jennings IMO. Jennings will not be shut out again. I like Steve Smith over Manningham and Crayton. Smith should show more consistency week to week than the other two making him the better play.