So Punisher, a moneyball fan?
Just curious as you have basically the 3 most polished bays that are all high end prospects. Their all basically guys who shouldn't have a problem getting to the majors. Dawgpound already listed their stats, so I'll just add some opinion to what I think of them.
Hermida - Should be a .300 hitter in the bigs and prolly be a 20-20 player on the Marlins. He might have potential for more HR's, but since he will be in a pitcher's park I doubt he will hit a lot.
Quentin - He is basically ready for the bigs right now. He is your typical RF power hitter that shold hit for goood avg (.300). Arizona's ball park should help him out as a hitter, but the guy has 30 HR power in probably any ball park.
Barton - A moneyball player that made it to a money ball team. Like all your hitters, he is very good at it and should hit for a high end avg. To bad he didn't stay at C, but I heard his defense was pretty bad.
Petit - So far he is holding his own pretty well against older more experienced competition. He might not ever truely be a #1 ace type pitcher, but I'm sure he is convincing a lot that you don't need great stuff to be a real effective pitcher.