Help with starters today

Need help with Lineup:

Here's who I'm looking at starting, should I make any changes.

QB - Culter vs. G.B.
WR - Calvin Johnson vs. Min
WR - Fitzgerald vs. Oak
RB - Chris Johnson vs. NYG
RB - Ronnie Brown vs. NYJ
TE - Finley vs. Chi
Flex - McFadden vs. Ari

Bench
Kevin Walter vs. Dal
Mike Wallace vs. T.B.
Mike Williams vs. Pit

Should I start Walter today in the flex instead or leave my lineup the way it is? thanks for the help.
 
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