Just had the Calyx Kong USB DAC/headamplifier home for two weeks, and I liked what I heard.
Calyx Audio is a Korean brand, that for the time being make 3 different DAC´s, where the Kong i the smallest and cheapest model. So Kong is not King . The little Calyx Kong is cut out of a block of aluminium, so feels nice and heavy, weight 167 g. Cost around 135 euro. The connection is through USB and it gives you CD quality (16-bit/44kHz) in and out.