DeviantPC checks out 8 80mm fans. If you need case cooling, check it out!
The best compromise between noise and airflow has to be the Thermaltake
smart fan. Thermaltake has shown us that the sensor is not just a gimmick and
actually possesses a fast response time and reacts well to the changes in case
temperature. The fan speeding up and slowing down could be irritating if your
room temperature fluctuates wildly, but for general usage it is one of the best.