Tbg,
having extensive experience with computer based audio, I strongly suggest you should prefer Amarra instead of the Pure Music. I believe that Pure Music tonality is wrong. My Weiss Medea/Vesta setup is quite neutral and similar to yours so I believe you will easily hear the difference when you are listening to piano (Pure music sound is thinner than it should be)... I also saw some serious improvement when I used a firewire cable made by the professional division of Oyaide. Check AsiaWeiss for more info...
having extensive experience with computer based audio, I strongly suggest you should prefer Amarra instead of the Pure Music. I believe that Pure Music tonality is wrong. My Weiss Medea/Vesta setup is quite neutral and similar to yours so I believe you will easily hear the difference when you are listening to piano (Pure music sound is thinner than it should be)... I also saw some serious improvement when I used a firewire cable made by the professional division of Oyaide. Check AsiaWeiss for more info...