I have been looking so long for a windows music player that has the sound rendering as Xion does. Winamp came close but in my opinion it's way to flashy and it's mid to high range is, to me, weak. I can equalize Xion just fine. The compression feature is the final "convince" me feature I look for. I have no idea which compression technique you use. It's not important that I know It just made my ears happy.
I am thankful you didn't add "3D" sound virtualization. I think that feature in other players kind of degrades sound a bit.
For all the skinners, your talent is appreciated as well.