hey guys, i've had my 912 for awhile now and i'd like to replace my fan's in the front and the top. at the moment i'm running 4 coolermaster r4's ,but i'd really like to switch to the 200mm fans. i'm really not to crazy about the red or blue megaflow. has anyone tried any other 200mm fans in the 912? if so let me know which ones. any help would be great.