I wouldn't get an acrylic case. I built one last X-mas, what a fu*king nightmare!
That "fog" you are refering to is a thin layer of dust that builds up on the sides of the case; if you get an acrylic case. . . by an ass load of dust-off.
also, the acrylic might look cool once it's put together but, unless you plan on water or vapor cooling your gonna have over heating issues. I've got 5 case fans on my box, and it has overheating problems. The arcylic insulates, and holds in heat
and, with most of these cases. The motherboard mounts on the side of the case. You'd better know exactly what you want inside your box. . . because in order to install an extract dvd drive or hard drive or anyother drive for that matter you first have to REMOVE THE MOTHERBOARD b/c it is attached to the right side panel...AHHHHHHHHHHHHHHH. The thumbnails and descriptions on any website will forget to mention that.
but... it does look beast. maybe i'll post a picture....