
You can have LEDs or performance, usually not both. Keep that in mind.
Let me explain you fans and the different things that affect them.
Fans have a rpm, rotations per minute, dba - noise level, static pressure - ability to push air through a restriction, Cfm - the amount of air the fan can push. Those are the key elements to choosing fans.
To choose a fan you need to first set a noise level of which you want, 40db is loud. If anybody knows the link to the dba chart put it on here, thanks. Static pressure is more for pulling air through restrictions such as a radiator or a let's say cotton fan filter. The higher the static pressure the more air you are going to get pulling through such restrictions. Cfm is the amount of air the fan pushes, the higher the better.