Best Ever? I'll just put it this way. You get to a certain level and once your in that small circle of greatness....once you're in you're in. Brady is in, Joe Montana is in (by the way, can you really come up with a better name than "Montana"? and be Great at the same time?!, Manning is in (you make your choice but it can't be both), Elway, Wilson, Bradshaw, and the underdog Warner squeeks in. Not all Super Bowl QB's are the greatest as confirmed by many a debate such as Joe Namath and a QB standard at least should be judged on if they have won a SB.
In the Elite QB Of All Time if there ever was such a award in that inner circle of QB's I think curently it would end up being Tom Brady vs Joe Montana. Greatest two to ever play the game.