When the BitFenix Prodigy came out it was adored by the community, among other reasons for its looks and modability. People complained a bit about size, mentioning that the chassis could be big enough to fit Micro-ATX hardware, rather than only Mini-ITX solutions, and BitFenix took this advice well. When it released the Phenom enclosure, it immediately also came in a Micro-ATX version, and the same goes for the now launching Colossus M enclosures.
The Colossus M enclosures look quite different from the Prodigy and the Phenom series, but inside they are almost identical. They are able to house Mini-ITX hardware as well as Micro-ATX hardware in the Micro-ATX version, along with a plethora of cooling equipment, a full-size (though not full-length) ATX PSU, as well as plenty of storage devices.
The Mini-ITX version will house up to five 120 mm fans, five 3.5" or seven 2.5" drives, graphics cards up to 330 mm in length, and 240 mm water cooling radiators. The Micro-ATX version is a little more limited, though it still fits at least two 3.5" drives, if not two more 3.5" or 2.5" drives. Water cooling can be done with a single slim 240 mm radiator. The main benefit of this version is the added support for Micro-ATX, meaning that if desired, the user can use up to two dual-slot graphics cards.
BitFenix will have the Colossus M-series enclosures available through retail starting December, though there was no official word on pricing.