I can't hlp you much on the IDP, sorry!
I'd say the lineup you have looks ok, except I'd probably start Tim Hightower over Felix Jones, mostly because Beanie Wells is not 100%. You're also hurt because the Cowboys have three pretty good running backs, who I think may end up sharing the load this season. That being said, it still could turn into the Felix Jones show sometime this year, so keep an eye open.
Also, you look a bit weak at running back, so I'd watch the first few weeks' action really closely, and try to find a sleeper on the waiver wire.
PS---I like Mark Sanchez after seeing him in the preseason. Most fantasy analysts are not too high on him, but I think he may surprise a few people this year. Of course, this doesn't mean start him over Tony Romo this week