The best way to tell if your current cooling is adequate is to run a program like CoreTemp available here: http://www.alcpu.com/CoreTemp/
see what your reported temps are... under 60C at full load is good.
A note about your fan selection, I like the second fan but, it is a PWM fan and you only appear to only have one PWM header (CHA_FAN1) available on your motherboard (PWM's can be automatically manipulated by the motherboard) but the price is pretty good on those and the PWM fans will work on a three pin header, they will simply lose the PWM function (and instead need to be controlled manually just like a three pin fan). It can also be used directly to your PSU but without speed control.
Just something to be aware of