Here is another open air computer case that lets you easily test out new components. The M-ATX AIR supports M-ATX and M-ITX motherboards. It is made from 11-gauge steel with black powder coating. It can hold 120 to 280mm radiators on the back. Supports 2 x 2.5″ SSD drives.
This small form factor case measures 10.5″ long, 6.5″ wide, and 15″ tall.