Well the best growing system that grows the largest plants is not the easiest way to grow. Easy is that way for a reason, but if you have not tried or looked at it then Pick up an Ebb & Grow system. (its easy of sorts and can grow big) They have anywhere from 1 gallon to 5 gallon buckets for the plants and a double pump system to do the fill & drain. They also have a 55 gallon res to hold the nutrients and do the fill & drain.

It's a good cross unit but you need to have room to grow big with them. Controling the temperature is a must for a good quality grow.

You need more lights then what you have to grow big and quality with a system like this one. Discount Hydroponics - Hydroponic Systems

You can grow anywhere from 12 to 24 with a system like this one in place.

If you have the room and area then try to ad some CO² to your grow and watch how big your plants can get.

Good luck