You know, I'm teetering towards Czech's side of the arguement here, but with a few major caveats.
1) It has to be '07 Brett that shows up because he had been slipping badly the previous two years in almost every category and there's no proof that the '07 season wasn't a bit fluky and due to the fact that the Packers were damn good.
2) The team he goes to needs at least an above average o-line; as with most QBs, there's a correlation between sacks/pressure and INT numbers and that just gets amplified with a guy that will soon be 39 at the helm.
3) He needs to stay in the NFC, preferably the NFC North, West or South; if he goes anywhere in the AFC or the NFC East, the defenses there will take him apart.