I think the Texans have underrated their first two opponents. The lions really have a bend don't break turnover forcing D, and the Lions have serious weapons. It adds up to a loss, if you don't take care of the ball, and take the offense lightly just because KJ's a rookie and Charles Rogers went down.
And I think SD will do well this year. Anytime you've got a weapon like LT, they've got a chance.
That said, i have a feeling KC will be sucking big time this year. They're offense is two dimensional, and the defense sucks. O got worse with a worse oline. So I think the Texans should be able to get up for that game. Be close, and I'm still pondering my predictions, but that is more winnable than the first two games in my opinion.