From what I can gather, at RMAF Wavelength Audio was demonstrating a new, free music player for Mac OS X called AyreWave, which was designed for audiophiles.
I've downloaded it and compared it to Amarra Mini 2.0.1, which I've been using up until now. My initial impressions with both my high-end rigs (Stax O2 or Audeze LCD-2s) is that it's an improvement over Amarra Mini. The resulting sound is a bit more real, less "digital", with slightly greater texture to the instruments (low-level detail). I haven't done any comprehensive testing, just tried listening to whole tracks, or sections of good acoustic tracks in alternating players, so don't take my opinion as gospel. The player is free, however, but only has very basic features. It's easy to select and import a single playlist from iTunes though, which saves it from being too basic.
Worth a try if you have a good rig.












