RB2 and FLEX Help...WHIR

[kg112686]

Standard Scoring non-PPR

My RB's are:
Darren McFadden @ Buffalo
Ahmad Bradshaw vs. St. Louis
Beanie Wells @ Washington
Jahvid Best vs. Kansas City
DeAngelo Williams vs. Green Bay

I need to start 2 and obviously McFadden is one of them but who do I start with him?

Also I would normally start one of those RB's at my RB/WR/TE Flex option, but I am hesitant to do that. I start 2 WR's and my top 3 receivers are:

Miles Austin @ San Francisco
Brandon Marshall vs. Houston
Wes Welker vs. San Diego

Do I go with a 3rd RB or do I go with a 3rd WR at my flex position? Any help would be great!

[Yceman]

I like Run DMC and Best

Then Marshall and Austin

Not sold on Welker against SD, but he's more appealing to me than Bradshaw or Beanie.