RB roulette ... need some help (WHIR)

[Warpigs]

In a league where scoring is skewed away from yardage and towards TDs (1pt for 50 yards passing, 20 yard rushing, 20 yards receiving and six points for all TDs).

Roster settings are weird in that I can start four RB. Just struggling to figure out which four to run:

Cedric Benson vs. BAL (tough matchup, although he did have 120yds and a TD earlier this season)
Frank Gore vs. TEN (a no-brain starter in my opinion)
Kevin Smith vs. SEA (like his matchup, but he's listed as questionable)
Rashard Mendenhall vs. DEN (tough matchup)
Jamaal Charles vs. JAX (great matchup, unknown quantity)
Julius Jones vs. DET (another great matchup, but Jones is inconsistent)

Which four of these six would you start ... any why?

I'll gladly help you!

WP

[Cowboys 4 life]

Cedric Benson vs. BAL (tough matchup, although he did have 120yds and a TD earlier this season)
Frank Gore vs. TEN (a no-brain starter in my opinion)
Kevin Smith vs. SEA (like his matchup, but he's listed as questionable)
Rashard Mendenhall vs. DEN (tough matchup)
Jamaal Charles vs. JAX (great matchup, unknown quantity)
Julius Jones vs. DET (another great matchup, but Jones is inconsistent


Benson - He put it up last time and has proven he can do it against tough D's.
Gore - Must start because he is involved in passing and running. He also has that gear that gets you 10 point plays.
Jones - Seattle should role here giving JJ a chance to hit 100 and a TD.

The last one is tough. I'd take Smith because he gets all the carries and catches passes to.