It is hard to top the ESPN 30 for 30 or HBO sports documentaries, but the "A Football life: Bill Belichick" on NFL Network was one of the best I have ever seen. It was the first of a series for them, I have only caught the Reggie White/Jerome Brown one and it was good, but nothing has compared to this one so far. Their "A Football Life" for Tom Landry debuted last week, appointment DVR for sure. I was surprised that Bill allowed the access that he did, but this two part doc allows you to see the Coach for more than what you see on Sundays.
For this documentary I give it a 5 out of 5 beers, it is a must see!! So look for it on-demand or keep an eye out as no doubt the NFL Network will release them on DVD, probably for the Christmas season upcoming.