I have the Adona Signature 4 shelf model. While shopping around for a rack the AS seemed to me, theoretically at least, as the best design in isolating the shelves from one another. Of course what clinched my buying decision was that a used set came up for sale at half price. Supposedly it was purchased for use at an audio show for a weekend. I admit the Reference is more visually appealing, but I do like the black, and my eyes are closed more times than not. Good luck in finding a rack that makes you happy!