My current top 5 NFL QBs, generally speaking: 1. Rodgers, 2. Brady, 3. Brees, 4. Stafford, 5. Schaub (if healthy, which is never). Eli is probably 6. I'm disqualifying Peyton until I see him play well again.
My currrent top 5 NFL QBs, based on deep ball accuracy: 1. Brees, 2. Rodgers, 3. Eli Manning, 4. Romo, 5. Schaub
I'd say Flacco is a top-16 QB (upper half of NFL starters). I wouldn't put him top 10. Sometimes he does very nicely, and sometimes he disappears. Flacco had some monster games with Torrey Smith last year. He doesn't have an elite group of receivers, but he also isn't the elite QB to make his receivers seem better than they are. Lots of QBs do very well with one elite WR and a bunch of scrubs. Brady with Welker and scrubs (Branch, Edelman, Ochocinco) since Moss left; Stafford with Megatron and scrubs (Nate Burleson = Seattle and Minnesota reject, Titus Young); Schaub with AJ and scrubs (Kevin Walter, Jacoby Jones). Boldin had a dropoff going from ARI to BAL, maybe if Flacco were better then Q would be putting up bigger numbers.