Just for the heck of it, here's the DVOA of the '99-'01 Rams, the '07 Patriots, and my pick, the '02-'04 Chiefs.1999 Rams - 12.4%2000 Rams - 25.9%2001 Rams - 18.2%2002 Chiefs - 38.0%2003 Chiefs - 32.2%2004 Chiefs - 32.9%2007 Patriots - 45.2%If you want to go with the best single-season offense, DVOA says that New England is head and shoulders above the pack. If you want to reward longevity, though, the Chiefs juggernaut handily outperforms the Rams juggernaut (the Chiefs' worst season was better than the Rams' best).Why on earth would DVOA think that the Chiefs had a better offense than the Rams despite the Rams scoring so many more points? Well, for starters, DVOA adjusts for strength of schedule, and those Rams teams had some ridiculously easy schedules. Second off, a simple metric like points is heavily influenced by field position, which is in turn heavily influenced by a team's defense. The Rams didn't outscore the Chiefs because they had a better offense, they did it because they had a better DEFENSE. Also, iirc, the Rams played at a higher pace, which meant a lot more offensive plays per game, which also explains how they put up such gaudy counting numbers.Those early decade Chiefs, though, were the most insane offense I have seen, though. Their #1 WR was Eddie Freaking Kennison, their QB was the always-underrated Trent Green, they played in what was at the time the toughest division in the NFL, and their defense was abysmal, yet they still wound up dominating the league for three straight seasons, mostly on the strength of the best offensive line I have ever seen (as well as killer red-zone weapons like Priest and Gonzalez).