Who should I play at flex?

[CalvinEdward]

Non ppr 1QB, 2RB, 2WR, Flex, TE, K, DST

Starting:
QB: P. Manning
RB: Foster, Hillis
WR: Colston, DJAX
Flex: ??????
TE: Tamme
K: Carpenter
DST: Miami

Who should be my flex?
Nicks v. Phi
Collie v. Jax
Blount v. Det
Brown v. Buf
Torain @ Dal