Who is the best Quarterback in the NFL after week 6?

Its been a very good year so far but I have a huge poll for you guys, who is the best QB in the NFL so far this year? is it Mark Sanchez not because of his stats but because of his team leadership? Is it the explosive Phillip Rivers? Is it the stat machine defending MVP Peyton Manning? Is it the underrated Joe Flacco? The surprising Michael Vick or Donavan Mcnabb? The Tom Brady? The Aaron Rodgers? Who is it? Tell me who you think!