If I get either of these cases I plan on using the intake and exhaust fans that come with them and just adding two more fans for the top also as exhaust. I will be air cooling the cpu with Cooler Master Hyper 212 EVO instead of an enclosed water cooler. My question for the top fans is should I use either air flow fans or static pressure fans. And what size fans should I get. The Fractal Design Arc Midi R2 comes with 3x 140mm fans and the Corsair Obsidian 450D comes with 2x 140mm fans and 1x 120mm fan.