VinDSL's case looks exactly like the midtower shell I salvaged from my sister-in-law's discarded Gateway.
I made extensive mods on that case to use it as a test-bed. I threw away the bulgy plastic side-panels, planning eventually to replace them with aluminum sheet metal.
The power-supply accommodation needed some modifying. The case does not come with the standard ATX mounting holes for the PSU, and the aperture for the PSU needs to be widened. For that, if you want to add a second 80mm fan between the PSU and the existing exhaust hole, then the rear case metal will need to be reinforced to support the weight of the PSU.
I encourage people to pick up "free" junk ATX cases and mod them, even with the price of the CoolerMaster Stacker now approaching $100+ during some sales. My two-year old "MOJO" build uses a 1995 Gateway 2000 full-tower case -- and yes -- heavy, man, heavy. That case was a transition between AT and ATX case standards, so the motherboard pan required drilling a single hole -- the mounting hole that is 2 inches behind the I/O plate -- to fit an ATX motherboard -- with the proper brass standoffs or fittings, of course.
My Conroe-build will use a Compaq ProLiant server case -- vintage 1994/1995. Talk about roomy! The forward case has a slide-out hot-swap hard-drive rack for about four to six hard disks, and the rear of the rack has a frame to attach 120mm ventilation fans -- putting them at the case-center and reducing fan noise. The fans then draw air from across the drives and from the case front-bezel.