Why would you think Detroit will shut Peterson down?  I mean Detroit couldn't contain the crap that is Kansas City last week, and AP is not crap.
Matthews is not the TD back and Tolbert has really become the #1 there.  Barring injury to Tolbert, Matthews should never be in consideration.  The Bills pass an awful lot, but they do use Jackson in the passing game and he is clearly the #1 guy and main work horse.  Hightower seems to be the main back, they run a lot, but they spread the wealth a lot and dallas is a fairly difficult matchup.  
So Peterson without question, and I'd go with Jackson as your second.