First to answer your questions on McCargo. He has a nose for the ball and seems to be able to penetrate the line and blow up plays when he's in there. That being said, we will see if he can do this as a starter. He isn't yet tested to hold up for a whole game but in our style D he doesn't have to as we rotate DT often. So yes McCargo is good enough to pass on a DT in the 1st (although if Ellis or Dorsey miraculously fall I say grab'em).
As far as Youboty goes, there's no question really about his talent just his toughness. If he can stay healthy and grow in this D he might be a solid starter one day.