Enermax Chakra ATX Case with 25cm Fan
 

The Chakra is very quiet in its operation, despite having the biggest fan I have ever seen on a computer case. The fan is so quiet it is only audible if you put your ear next to it while in motion. Even with the case loaded up with the 25cm fan and two of Enermax's new 120mm Enlobal fans, it is extremely quiet while keeping all system components nice and cool.

there is plenty of room left to make the fan even BIGGER