I'm not sure if it's been posted in this thread, but since 2001 only 5 QBs have represented the AFC in the Super Bowl. Yes, 5 QBs in 16 years...
Tom Brady (x6; '01, '03, '04, '07, '11, '14)
Peyton Manning (x4; '06, '09, '13, '15)
Ben Roethlisburger (x3, '05, '08, '10)
Rich Gannon (2002)
Joe Flacco (2012)
2016: Brady or Ben