It's not that quiet a case, I build a system in one. Main issue, small front intake fans. Metal panels are not sound dampened....
If you want quiet. With NO rattles. This is your case:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129174
Dual chamber design isolates heat and noise: the power supply resides in a separate chamber to isolate heat and reduce system noise
Innovative three-layer, sound-deadening side panels and front door (aluminum, plastic, aluminum) dampen noise and ensure Quiet Computing
Front door vents, as well as wider vents along the door frame, improve airflow into the chassis.
Filters and filter doors are integrated as one unit. The doors themselves have been modified to provide greater airflow, resulting in cooler system temperatures.
Drive bay covers are vented and include air filters to provide better airflow.
Lower chamber fan is now located in front of the hard drive cage, allowing for installation of longer PSUs as well as easier cable routing between the lower HD cage and the power supply.
CPU cut-out allows for easy installation of CPU coolers