Yeah, I think Marciano hits it here. We certainly (and usually correctly) think of the NFL as a QB league, and that position has a lot to do with handicapping teams, but that's not the same as simply ranking QBs. Brees/Newton/Wilson is certainly a better trio than Goff/Keenum/Foles, but that doesn't mean that NO/CAR/SEA would beat LAR/MIN/PHI.
I don't think that there is a team in the NFC that I would take over the Rams right now, and I would have MIN right behind them. Also, it's not like Goff/Keenum have been poor and getting lucky, or have simply been 'game manager QBs, they've been legitimately good, and they just happen to be surrounded by complete, talented rosters. Seattle has been pretty inconsistent, as has CAR, though I would put NO just outside of that top tier in the NFC, because the defense has been better than expected and Brees is still an amazing weapon. Also keep in mind that NO is a dome team, but the Super Bowl will be in a dome, they could play the Rams in LA (so weather shouldn't be a huge factor) or the Vikings in a dome, etc., there is no NE/PIT/BAL winter game ahead for them in the playoffs.
Remember, Brady wasn't a top-5 QB by almost any metric back in the '01-'04 seasons, but those Pats teams were fierce.