The "mystery case" sounds a lot like my Rosewill CHALLENGER. I find it to be a very nice case, in fact I have two of them. Others recommend cases such as the Antec 100 or one of the CoolerMaster HAF flavors, but for me (I'm only using single cards) the CHALLENGER is a very nice case. I've modded one of mine and mounted two 8w fans to the outside. They won't fit on the inside because they are industrial; they are full metal body and about twice as thick as a normal plastic 120mm fan. I'm not quite sure of the CF/M, but they are loud as hell and keep my card very cool, even when heavily overclocked. This is why I did not go with the cheapest CoolerMaster HAF, because it only have one 120mm side mount.