Help! Pick my flex and WR position!

[NameThatHurting]

Guys, I need advice in 2 of my leagues.

Do i start Legadu Naane or Santana Moss over Mike Sims Walker?

In my other league...

Do I start Hakeem Nicks over any of these 3 backs in my flex position?
-Ryan Mathews
-Rashard Mendenhall
-Matt Forte

If not, do I start him over Greg Jennings or Roddy White this week?

Thanks for your help!