It's definitely the East.
East:
NE- SB Champs, should take small step back but still class of league.
NYJ- reached div rd last year and have improved, also they own the Chargers who were the best team in the AFC West last year.
Buf- Solid everywhere except QB and that's only b/c Losman has no experience. If Losman doesn't play like a rookie they can be very good
Mia- awful last year but have some talent and a new CS, should be at least a few games better
West:
SD- came from nowhere but they have young talent and should contend again.
Den- always overrated, make WC rd then get thrashed. Jake Plummer is awful and they will not make the playoffs this year.
KC- D is better but how much? O is getting older. Should be better and maybe a playoff team
Oak-really improved on O but have no D, will be exciting but will lose 9-10 games.