it WAS a stock promedia casing. i cut off the side metal to have a complete window. it came with 80mm fan slots (1 on side and 1 on top), which i aggressively cut them to make them 120mm.
then, few months later, i thought....'why not paint it all black from the inside'. so i got on with it.
currently 6 fans installed (used to be 7, but after installing the HIS 4850, 1 of the 120mm fans lying in the basement of the casing had to be removed). 1x120mm on top, 1x120mm on side, 2x80mm at the back, 2x80mm behind the HDDs.