I had the same question regarding the weight issue and stability. I eventually purchased the StudioTech Ultra. Each movable shelf can support 100lbs. Each shelf can be mounted with either rubber tipped or spike shelf supports into a steel frame that is conceled with wood veneers.It is vented with steel mesh on three sides and has an extender panel on the back for equipment that is deeper than the average equipment. With optional kits you can rack mount your equipment, add fans, drawers, wheels, (it comes with hard wood floor glides or carpet spikes). It is a great piece of furniture for heavy equpment.