http://www.newegg.com/Product/Produc...-065-_-Product
140mm fan on top, 120mm fan on the back, 120mm fan on the side, two 120mm fans on the front, and the power supply fan.
This is the case I use for my gaming computer.
- X
P.S. - To answer your question, smaller cases are better than larger cases for cooling. Less airflow is required, and air can't absorb heat readily enough to make a larger case viable (unless its filled with oil). I've never personally found case material to make a difference.