Like you said, very similar to my own situation. I also have LT on the bench but the other options are clearly better in my eyes. I'm leaning towards Hernandez myself. Nelson may be the #2 in that offense, or he may get lost behind Driver and Finley this game. Sproles I like A LOT in this game, I can see a lot of underneath stuff going his way. Since you count return yardage, I'd go with Sproles, since he's returning kicks. Otherwise I'd go for Hernandez in what should be a shootout.
Just noticed you're picking two. I'd go Sproles and Hernandez. I think VJax picks it up this week and I don't see a big game for Floyd.
12 Team $ (PPR + Return Yardage):
QB: Tom Brady, Andy Dalton RB: Charles, Lynch, Martin, Stewart, DeAngelo Williams, Rashad jennings, Joe McKnight, Leon Washington WR/TE: Antonio Brown, Brandon Lloyd, Randall Cobb, Ted Ginn K: Bryant DST: Bills