I think the best way to answer this is "who would I want to QB my team" - so not based on stats, past efforts but rather who gives you the best chance to win. For some, they may prefer a guy that will get a lot of stats and a near guaranteed playoff birth, others might want someone who has shown the ability to win the big game (i.e. if your team has sucked, get consistency, if you have been good but not over the hump, you may want some more boom/bust but the better chance to win it all).
With that my list would be:
1. Brady - Possibly the last year he gets this, but has shown the ability, poise, leadership and courage to win it all (3 times). Great and clutch
2. Rodgers - The most prolific offensive player in the league (until Newton passes him?) who has shown the ability to win it all.
3. Brees - BARELY makes it over Eli, and if I werent biased for Eli, maybe I'd swap them. Brees will have better numbers, but if he has to play in poor conditions during the playoffs, even with his cold weather college games, Its harder to trust
4. Eli - May have more bust potential, but I haven't seen as clutch a QB in some time. The guy gets it done when it counts and has done it often and twice on the biggest stage. If I NEED to make the playoffs, I'd bump him down. If I want to win a SB, maybe he gets over brees.
It gets tougher after this because more question marks arise.
5. Vick - No one mentions him and I think his team will be far better this year. If he plays somewhere between this past year and the year before AND can stay healthy, no other weapon like him (Newton is coming though). Big boom or bust - but could boom you to a SB
6. Roeths - Next year he may be off the list. Im not so sure he is every going to be fully 100%, always ends up dinged and he seems not to have progressed while others have (i.e. Eli and the new youngins next on this list). But he has two rings, even if he only played well in one of three SBs.
7. Stafford - Assuming he stays healthy, he could be the next great QB. But he has not done it on the big stage. A lot to prove - but he looks great and on the upswing
8. Newton - Ridiculous offensive player - but can he be clutch? Win Games? Go far in the playoffs against great, physical defensive teams? Just don't know. But he has the promise and abilities unmatched by most anyone. Will either be up a few slots or off the list next year imo.
9. Rivers - This year was AWFUL. But he has been clutch in the past, even if he has not gone especially far in many playoffs. A year ago at this time he'd be up a few slots. Im going to give him one more chance ahead of the rest if it were my choice.
10. Romo - Just can't quite seem to put it together, but has looked great at times. Has the ability but he - and his team - need to man up and clutch one through.
Just off the list
Schaub - If he fully heals I might but him at 10 due to Romo's failures in the past.