I do believe that a good rack can help to possible improve the sound by eliminating vibration. But I am not afraid to admit that my main reason for being in the market for a nice rack is that I want something that looks good to display my gear. I know some audiophiles say "who cares how the xxxx looks, as long as it sounds good". For me, looks do matter as I am spending a lot of money on these components and part of my enjoyment is not only the sound but also the look and feel. for the amount of money I spent on gear, I want something that looks and sounds good.
Anyway, just my two cents....
Anyway, just my two cents....