I'll bite. I'd break your top-10 into 3 tiers, because, while it's often too hard to make individual distinctions, there are some clear breaks in the data:
Tier 1:
Manning the Elder & Brady (collectively, "Peytom Branning")
Tier 2: Your 3-6 (Brees, McNabb, Palmer (if healthy), & Hasselbeck), which I have no problem with.
Tier 3:
Bulger, Green, Roethlisberger (if healthy).
This leaves me with a top-9. I don't really know which of the remaining players should be #10. I'm not a Mike Vick fan. I don't think we have enough data on Grossman or Rivers (both can count the number of games they've played against non-horrendous defenses on their thumbs) to crown their asses just yet. Delhomme is nothing without Steve Smith. The Giants homer in me wants to pick Eli, but he has 3-4 scary dumb/inaccurate throws per game, which is just too many.