Gil Brandt is 87 years old (he's the same age as Larry King, Justice Ruth Bader Ginsburg and the late James Brown). He left the Cowboys 31 years ago when Jerry Jones bought the team and took over. In 2014 he rated Johnny Manziel the #1 player in the Draft saying that he was high character (lol). In 2007 Gil rated JaMarcus Russell the #1 player in the Draft.
Old Gil is lovable and everybody makes mistakes but sometimes he just gets it wrong (sometimes he's right too). My point in raising Manziel and Russell, who are among the biggest QB Draft busts of all time, is just to caution you re believing everything Gil says.
BTW - I'm hoping for Tua but think there's a decent chance that Herbert is the pick.