I think that the NFC East is the best division in the NFL. The NFC East has a lot of competition in it and also has playoff contending teams. These teams include the Washington Redskins, New York Giants, Philadelphia Eagles, and the Dallas Cowboys.
The competition in the NFC East is higher than some people think. The Giants didn't make it to the playoffs this year, but don't forget when they beat the Patriots in the Super Bowl the previous year. The Cowboys almost made it into the playoffs this year until the Redskins crushed their dreams. RGIII and his Redskins made it to playoffs, but their championship run was ended by another top QB, Russell Wilson. Not too long ago, the Eagles were one of the best teams in the NFL, and with Chip Kelly, they might be able to go back to that status overtime. With so many good teams in one division, it's not easy to pass another team or be crowned division champions.
As a great historical fact, from 1990-1993, the NFC East division had won four Super Bowl trophies. These teams included the Giants, Redskins, and Cowboys.
In conclusion, the NFC East is one of the best divisions in the NFL. I believe it will stay the best for a while, but only time will tell.