My strategy has been good looking sturdy racks… then to follow through with vibration control. I have a Silent Running Audio Ohio Class isolation platform for my turntable (I highly recommend these). Then a combination of Black Diamond Racing platforms, cones, and Nobsound springs. Over the decades I have tried a number of different technologies.
Alternatively, you can get a fully suspended and dampened rack… but my feeling is it is more cost effective… or at least spreads out the cost when you start with solid racks, then add vibration controle one component after another. This allows you to customized it to each component. However, You need space to do this!
So, I recommend purchasing from companies that have been around forever so, if you need more you can get them. Height adjustable is really useful when you start experimenting with vibration control… it is easy to end up adding 2” to 6” to the height of a component. Think ahead.