Second the atma-sphere MA2 MkIII. And it's not just "sounds", I have actually heard individual notes that were previously obscured. Little things, like a ghosted guitar note. Also, the ability to follow the musical lines, especially in the bass. I would stress this the most: the bass lines are the most clear and disticnt I have ever heard, better (to my ears) than the Dart's, BAT, and Halcro.
Ron
Ron