Favre is the greatest to ever play the game, in terms of skill, i would have to say John Elway is the best quarterback to every play. But in terms of greatness, Brett Favre takes the cake followed by Joe Montana.

Best modern day QB's (Skill/accomplishments/greatness/clutch ability):

1. Elway (MVP, Super Bowl MVP, 9 Pro Bowls, HOF)
2. Montana (2 MVP's, 3 Super Bowl MVP's, 8 Pro Bowls, HOF)
3. Brady (MVP, 2 Super Bowl MVP's, 4 Pro Bowls)
4. Favre (3 MVP's, 10 Pro Bowls, Multiple NFL Records)
5. Warner (2 MVP's, Super Bowl MVP, 4 Pro Bowls)
6. Manning (3 MVP's, Super Bowl MVP, 9 Pro Bowls)
7. Young (2 MVP's, Super Bowl MVP, 7 Pro Bowls, HOF)
8. Aikman (Super Bowl MVP, 6 Pro Bowls, HOF)
9. Marino (MVP, 9 Pro Bowls, HOF)
10. Kelly (4 Pro Bowls, HOF)

This doesn't include old school guys like Unitas, Staubach and Theisman.