I have this case:
It comes with 2 120mm's at the front and one at the back, and a large 200mm at the top.
You won't need more than that, though a nice side fan may be good if you can get hold of a quiet one.
Its best to have the fans built into the case on low, all except for the top which is better at medium or high.
The 120mm ones are way to loud for my tastes at medium or full, but at low, they move quite a bit of air anyway, and are pretty quiet indeed.