i've just (last night) installed 3 x noctua nf-s12 fans in the side of my coolermaster stacker 832... all is well, very quiet...just need to find a way of controlling them now.
PS: for anyone else thinking about doing the same, the fan mounts on the case side door are great except the dust filters seem to stop air flow dramatically, so i just took mine off and mounted the fans with the rubber gromets onto the plastic x frame..