Airflow Intake

Hi So, I am really falling in love with the nzxt kraken AIO cooler but I only have experience with the intel stock cooler so I have some researching to do. One question that I can't seem to get answered is, do I uninstall the fans at the front of my case and replace them with the radiator fans...

hey guys. so i got a new case ( sort of... fractal design define s ) i need recommendation for what kind of intake and exhaust fans should i buy. and what brand. ( a list will be appreciated so much ) and i saw an intake at the bottom ( beside the power supply ) should i put a fan in there...

How can I tweak this build to make it so it can run GTA V at medium-high settings? http://pcpartpicker.com/p/XBvmt6 I'm on a budget, so making it cheaper will be great!