Yes, I've cut down even on the case...the plastic container costs $5...
Cut a few holes here and there for the PSU and water cooler.
PSU, HDD tucked underneath the plastic lid.
Mobo: Asus Maximus V Gene
CPU: i7 3770K
RAM: RipjawsX F3-1600C9D-16GXM (2x8Gb)
HDD: Samsung 840 Pro 128GB
Cooler: Corsair Hydro H80i
PSU: Corsair CMPSU-430CXM 430W Bronze 80+
OC: 4.8 Ghz using the ROG profile
The plastic container is great if you want something really flat, you could put a whole stack of them on a homemade shelf...