I'd likely go with DWill. He's playing against a beat down Cards D. Jacobs might get a TD vs the Skins but that'll be about it. And in all likeliness the Colts will be throwing from behind Vs the Texans so Addai looks to be a non factor.
I'd go with DWill this week. However, keep an eye on Addai (Jacobs isn't worth anything until Bradshaw gets hurt) - with manning out, Colts will have to run a LOT more. If Addai separates himself from Brown, he could have some good value - similar to 2-3 yrs ago. Good luck.
it's Williams this week. I wouldn't be too quick to drop Jacobs, though, he will be a valuable fill in/matchup play in case of injury or very bad matchup for one of your other backs at some point this season. He is always a threat to get in the endzone.