build a case from scratch. My current project in fact.
Mine as well. My build concept is based around fresh filtered air in through the base, and all hot exhaust goes out through the top.
In more detail, to accomplish this, it will be a cube. I've decided to go with a solid color acrylic (rather than the usual transparent stuff). for the four sides with metal/mesh top and base. Rotating the mobo to put the i/o and pci access on the top of the case will also help the airflow design by venting the VGA out the top as well. I will also be putting all of the i/o and switches normally found on the front panel up top. I want to try putting the optical drive at the top, too, so that the tray opens upward. I just hope this doesn't prevent the drive from functioning. Air intake as mentioned will be through the bottom, with the base raised off the ground by cutting the acrylic sides so that the bottom corners extend downward to act as legs/feet.
To make it slightly prettier, I will put CC lighting underneath, and cut a design into at least one side panel, that will be filled with a dyed clear resin.