I use 3 Solid Steel racks between my 2 set ups. They were expensive to me but worth it. They are solid as a rock and I believe my outlay was around $2500.00 for the 3 racks, purchased at Music Direct and delivered within 3 days.
The Pangea racks are garbage. I owned one but found the curved front to the shelves would not allow my equipment to fit without overhanging the shelves. I know the Mac equipment is bigger than most other brands and the rack was straining under the 80-pound weight of my Mac integrated. Compare the Pangea rack to the SS and you will see for yourself how flimsy the Pangea is. I have found most Pangea items to be low quality.