I'll second the recommendation by ruebent of the John Blue JB-3 speakers for desktop listening. I use them with an iMac connected to a Simaudio 100 D DAC via the optical output of the iMac and on to a Jolida 10 watt El84 tube integrated.
Of course it doesn't have the dynamic range or the volume of my main system but the coherence, imaging and sweetness of the sound make it a system I can listen to all day, and often do.
Of course it doesn't have the dynamic range or the volume of my main system but the coherence, imaging and sweetness of the sound make it a system I can listen to all day, and often do.