Who's the best in the NFL?

Although I am a Houston Texans fan and would love to say I think they are the best in the NFL but I can't. I am going in the direction of another AFC team, the New England Patriots. They only allowed 20 yards rushing to the Titans and Chris Johnson had 11 carries for 4 yards. If the run defense keeps that up I think the Patriots will go undefeated once again...this time they won't lose the SuperBowl.