Your choice depends on your needs. I like strong, flexible-use cabinets with good interior cabling space that can be customized easily with snap-in accessories and can house multi-vendor equipment. I find APC cabinets offer these features at a reasonable price (although not so cheap as the above offer
). I have also used Dell and Black Box cabinets, but have found the APCs to offer better features. It may be a local pheonomenon, but the APC racks are well packaged for shipping, so that they consistently arrive undamaged. Also, the trucking company calls me when they're coming and send a truck equipped with a lift-gate, which saves us lots of time.
One data point for your decision.
Ken