I strongly recommend the Audiosector USB DAC. $380, hand assembled in Canada by its designer, Peter Daniel. I found it to be, overall, about as good as the Altmann Attraction DAC -- with slightly different strengths.
Did you happen to try the headphone output of the Thingee. I am trying to decide between the Thingee and Headroom Total Bithead as portables. The Bithead has an internal DAC as soundcard and is said to be capable of driving some load.
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