Who will be perfect after week 3

As week four in the Nfl aproaches, there are three teams that are perfect. The Cardinals,Texans,and Falcons have remained perfect. All three of the teams have won because of their defense . Last week the three of the teams have won in dominating fashion. The Cardinals have been the suprise team. With the Quarter back competition in the pre season, the Cardinals went with Kevin Kolb. They have been impressive with their defense ranked in the top ten after week three. There defense have only given up two touchdowns. Last year  the Falcons had a disappointed season. This year with Ronnie White, Brent Grimes, Juilo Jones as Key players for this team. The offense has been clicking. The team is ranked below the number one Houstan Texans. The one two punch with both Arian Foster and Ben Tate have been deadly to defenses. Matt Schaub who is the passing leader with 1,269 yards. He has a ratio of 5 touchdowns with only 1 interception. With the run game ripping defenses apart, they are the team to beat. After the dust settles, who will remain unbeaten!