A form factor perfected for the CAD artist – this design features a slightly dished top to act as tray for small items like USB flash drives, a front bar for cables to rest with nice relief or for using Velcro straps, and a short rod in the front that pulls out to temporarily hang headphones, coiled cable, or even attach a mini clip-on light.  Finger-friendly front top corners can aid in lifting or moving the tower, and the sides have built-in handles for easy transporting.