As we approach the fourth week of the NFL, we only have three teams left at 3-0. So, which one is the best?

In the NFC, we have two teams sitting at 3-0. The Atlanta Falcons have been picked by many to go all the way to the Super Bowl. They lead their division in the NFC South, and seem to have one of the best teams in the league.

The other team out of the NFC is a surprise -- the Arizona Cardinals, who have run over their last two opponents. The Cardinals lead the heavily-hyped San Francisco 49ers and the Seattle Seahawks by a game.

Over in the AFC there is only one team left at 3-0 -- the Houston Texans, who have improved steadily the last few years. Have they finally put together a winning formula that can take them all the way to the Super Bowl?