I'm listing top five besides the Pats, because frankly I can't be objective about them. Also I was on a plane for the Ravens game, and haven't seen Baltimore play this year, so don't have a good sense about them but from what I've seen and read they are formidable.
1- Giants - they look unbeatable, frankly, which tears me up inside
2- Colts - they almost lost to Miami, but then Manning just turns on his magic that guy is hot this year (again, it kills me to say it, but it is true).
3- Steelers - I know their record isn't so good, but they are coming together
4- Eagles - their depth on offense (other than running) is sick
5- Vikings - If Favre's arm can stay healthy they will make it to the NFCC game. What impressed me last night was that GB stopped the run, but Vikings were able to go to a decent passing game.
I would put the Patriots probably between the Colts and Steelers, but as I said I cannot be objective about the Pats so won't bother.