Sounds interesting, a few question for the rules.
1. What's a USB stick DAC? The DAC itself plug into USB port and output is also on the stick itself and no external power allowed?
2. I guess you will be picking the USB stick DAC and the other person gets to pick the high end DAC. What about everything else, the digital source, the physical source(player/PC), the IC, the pre amp+power amp/headphone amp, headphone/speaker? I
3. electronics have to measure similarly (by Amir), what electronics? Everything else or include the DAC? If include the DAC, I don't think it works, the best DAC by Amir's measurement is Matrix Audio X-SABRE Pro MQA,(yes it's only 2k not 15k) but there is no $100 USB stick measures similarly.