Wow! Excellent work and welcome to the forums. Truly impressive skins. They really do look fantastic.
A couple of small points. I absolutely love the icons you have created, they look really very good. You've missed one though for Playlist Mixers, or at least MB is still using the default icon for those when i run the skin.
When clicking on the shuffle button in the player bar it cycles through shuffle on/off but not auto-dj also as is normal. is this on purpose?
finally (and i am nitpicking here) from your images, it appears that you don't use the right side bar. lots of us do however and i feel it needs a little more work. in particular, the now playing/track detail header bar is still grey. hope that makes sense, i can post a screen if not...
brilliant work though!