hey 420....
the different systems have..
different mediums
different watering systems..
some water from the top.. some water from the bottom.. some mediums like hydroton clay pellets require much more watering (pump on) because the medium hold less water..
Some require net pots, some require rockwool, others are very flexible and can handle almost any medium...
I would higly suggest a bucket system....
General Hydroponics WaterFarm 8 - Pack
not neccessarily this system, but somethig similiar...
You will also need a quality pH tester and ppm meter..
cheers