Yes vibration control makes a big difference but like everything else you have to try before you buy because not everything works, some make things worse, and price is no indication of performance. The most consistently high value I know of are BDR Cones, Shelf, Pits and Those Things. These are all carbon fiber, which is an inherently stiff and vibration damping material, but not all carbon fiber is created equal. A big advantage of BRD Cones etc over a rack is the Cones can be used under everything forever while the rack may not fit or work in every situation. This becomes important as things change over time.
How big a difference does it make? I once brought a component home to audition and being a bit lazy and pressed for time decided to just hook it up and listen. Even after a good warmup I was sorely disappointed. Of course I was comparing it sitting on its lame little rubber feet to my component sitting on a BDR Shelf with Cones and Pucks. Once I swapped all the BDR over the new piece sounded quite good. Get the right stuff and it is worth way more in performance than you can get with the same money spent on a better component. Plus its forever. I've had my BDR well over 15 years now.
The Aeon rack you are considering looks nice, but seems absurdly expensive. For the same budget you could buy Black Diamond Racing Cones, Shelf, Those Things and Pucks for every component, plus a Source Shelf for your turntable (or CD) and have guaranteed (not iffy) results with money left over. Not to mention BDR looks better. And is way more versatile. And, with Mk3 and Mk4 Cones you can even fine tune a little.
BDR has been around for like 20 years. They have sold a ton of product. Which you almost never see for sale used. Because the people who get it realize its the best, and you don't sell the best. When they do, they get pretty darn near full value. Let that sink in. Choose wisely.