I received my Woo Audio headphone stand a couple days ago. Since I've hung my HE-500 on it there's been a night and day difference. I immediately noticed much greater base-extension and smoothness in the top end. The mids are long and thin and overall the sound is heavy and sturdy. This stand has an excellent sound signature.
I got to get me one. Wait. It has to improve the sound stage as well. Or it's a no go.