Buying a rack and then adding vibration control can be tedious and expensive. It does however gives you ultimate flexibility with trying different vibration control devices (a tweaker’s delight). But if you’re the guy that don’t want to mess around with vibration controls then couple of ultra elegant solutions comes to mind in addition to Core Audio Designs,
Modulum Audio - https://modulumaudio.com/products/
Artesania Audio - https://artesaniaaudio.com
Bassocontinuo - https://bassocontinuo.biz/lines/ultimate-line/
And lastly, SRA isolation platform customized for your components.
https://www.silentrunningaudio.com/component-specific-design/