Two of the NFL’s best teams will clash on Sunday Night Football, when the Chicago Bears host the Houston Texans at 8:20 p.m. EST on NBC. Lovie Smith’s club stands at 7-1 after six straight victories, and Chicago has been led by an aggressive defense that seems to score on a weekly basis. The Texans are also 7-1, led by a balanced offense and a stingy defense of their own.