i used to have my kit on my tv's cabinet stand and was happy with it. then, i got sky and needed another shelf, so i got an atacama equinox av, purely for the extra shelf - i wasn't expecting to really notice any difference in performance. the difference wasn't at all subtle. maybe in isolation, each small improvement wouldn't have meant much, but everything improved and so the difference was huge. i don't know if you would get such a big improvement as my floor is quite uneven and so some of the improvement will be down to the components now being level. but in my experience, yes a decent rack can make a big difference.