Uhh, well there's no computer case so I can't tell if you have too many fans or not.
It would depend how many empty slots on your case there are, and how loud you want your computer to be.
More airflow generally = more noise unless you get the good quality fans. Or bigger fans, bigger fans move more air with less speed, but that again depends on whether the case supports them.
This is a better and cheaper thermal paste as well:
http://uk.pcpartpicker.com/part/arctic-cooling-thermal-paste-acmx4