Week 3 - RB/WR Questions..

I started the season 0-2 and need to make up some ground this week.  Here is what my starting lineup looks like

QB Aaron Rodgers

WR(2) Miles Austin, Greg Jennings

RB(2) Tim Hightower/Darren McFadden

TE(1) Brent Celek

DST(1) PATS

K(1) Heartley

Here is the situation I also have an open Flex spot that I can play any of the following in.  This is a PPR league.  Here is my Flex players please let me know which way to rolll....thanks in advance.

FLEX(1)

Ahmad Bradshaw, Mark Clayton, Steve Smith (NYG), Demariuys Thomas, Mike Thomas (JAC)

What do I do?