As I experience the usual pitfalls of the Zorloo Ztella - good sound but terrible build quality and constant static noise - I'm looking, disgruntedly, towards an Audioquest Dragonfly for replacement - does anyone have any first-hand experience and suggestions about which model to choose, or indeed, if the higher pricetag on the Red and Cobalt really translate into a distinctively better sound? Also, does the "tail", which has to be bought seperately in order to hook it up to a mobile phone (my main usage), have similar noise and quality caveats which have caused me to hate the once-loved Ztella?