Fan controller for 3 fans included
1 rear Fractal Design 120mm @ 1200rpm included
1 front Fractal Design 120mm @ 1200rpm included 1 front 120mm fan (optional)
1 top 120/140mm fan (optional)
1 bottom 120mm fan (optional)
1 side panel 120mm/140mm fan (optional)
1 x CPU fan header
2 x system fan headers< WITH MOLEX you could power all of the additional fan options,but how many you would use , is up to you.
I would say offhand, you can install 3-4 more fans but... why? It would seem to me that the idea behind your case choice is quietness, the more fans added, the less quiet your computer will be. If I were building within that case for quietness, I would see what my temps and noise are like with the stock fan configuration, work from there. If you do want to add a fan or two right away, I would suggest an intake on the floor of the case (between PSU and HD cage) and an exhaust on top (low RPM, 140mm).
Hope it helps some...