There is much to chose from in the sub-$1000 range. Look into:
HRT Music Streamer II Plus ($349)
Cambridge DAC Magic ($429)
Simaudio 100D Dac ($599)
Musical Fidelity M1Dac ($699)
Rega DAC ($995)
Peachtree iDac ($999)
All these units have received positive reviews and user feedback on various forums. Hope this helps narrow the selection down.
HRT Music Streamer II Plus ($349)
Cambridge DAC Magic ($429)
Simaudio 100D Dac ($599)
Musical Fidelity M1Dac ($699)
Rega DAC ($995)
Peachtree iDac ($999)
All these units have received positive reviews and user feedback on various forums. Hope this helps narrow the selection down.