Comment by Marsymars

> In which case they'd have silent cases with no glass panes, because those are thinner and a possible source of vibration. They may even glue (opaque) sound absorbing material to the inside of their cases.

I'd prefer no glass, but nevertheless just bought two glass cases because no alternatives that met my requirements were available:

* Fractal Design Torrent Compact - Best cooling available for a GPU-free, air-cooled CPU system. There exists a non-glass version, but it's unavailable in North America.

* Thermaltake The Tower 300 - Smallest form-factor case that will fit a 420mm AIO cooler. Only available with glass sides.