Case fan locations

I have a Cooler Master Centurion 5. I have extra 80mm fans and I want to add them to my case.



I already put one below the CD drive for intake (so now there are two front intakes). And I am looking at the two vents on the side of the case... I have an Arctic cooling 7 on the cpu (if that matters).



Should i put a fan on each of those vents? And should i make them exhaust? or one exhaust one intake? Would any of this mess up the airflow of the AC7? Ideas?

you just need to establish a flow of air. assuming that the ac7 is blowing across the fins you may want the side panel to be exhaust, in which case id be keen to run the rear and exhaust and fronts are intake.
best method is to just run it one way and monitor your temps