Need help w/ def? 49ers or Falcons?

Who would you play this week for defense?

49ers & Falcons?

If you have to pick one or the other Falcons. They are playing a team that relies on passing. They have a good pass defense. However, if you could stream a defense like Detroit that may go a little better. Hard pick.

Thanks, but Lions not available. These were the best options.

other than that I can pick up:

Packers, Colts, Redskins, Cowboys, or Dolphins.