Quote Pete Kaine:
The ATCS has to be just about my favorite case due to it's ease of build and those lovely quiet (when undervolted) 240mm fan solution, but I just wish it was made out of something a bit more solid and less vibration prone.
Totally agree, the panels are a bit thin but after layering with some acoutic foam I'm pretty pleased with it all, the space inside is wonderful to work with and everything runs very cool even with minimal cooling. I'm going to add my £3 bargain and see if it makes a difference. I'm having a bit of trouble getting the plastic drive bay button things off though, look like they can only be broken off?
The cheapest way to silence a PC is with long cables and a hole saw. Why bother acoustically insulating your case when masonry provides so much attenuation? Stick your case out in the hallway. £40 buys you a 10m HDMI cable and a couple of active USB cables.
If that's impractical for whatever reason, stick your computer at the back of the room behind a couple of sheets of rockwool. You can build a simple enclosure in a couple of hours that will provide huge amounts of attenuation without significantly impeding airflow.
I'm afraid neither of these are practical options for me but I was considering building a little enclosure for the tower, little worried about increased heat though.