Has anyone had experience with the Mechatronics 120mm fans? rated at 55cfm/25dba. Im looking to get some quiet fans, near silent, and saw these at a great price. im just wondering if there is a real difference between 46cfm/17dba noctua and this. i have a raptor hdd and i would like that to be the loudest thing in my comp.. i have passive cooled gpu/cpu atm, just looking for silent high cfm fans but dont wanna pay the price of noctuas.