Well, we'll see how the rest of the season plays out. Obviously Peyton is a better QB than Vick, but my point is I'm not so sure why everyone is so quick to bash on Vick after only 5 games, either because his stats "suck" or his team sucks. Rivers and Roethlisberger have sucked it up this season as well, both by statistic measures, and if you've watched them play. Of course, they're still good QBs that have had their issues early this season.
Of the QBs you named I would easily take Brees, Brady, Rodgers, and Rivers over him. I don't think it's so cut and dry to take any other QB in the league over him. I'm not counting Manning this season, but yes I would take Manning over him obviously. It's pretty annoying arguing QBs with Colts fans, because all they say is "well he's not as good as Manning!"