NUC7i7BNH Optimized Connection

I would like to setup a NUC7i7BNH. I have a 3 level townhome where the Stereo/Digital System/Kit is on the second level and the Verizon Router is on the lower level.

  1. Which is the Best connection because I can not do both:
    a. Connect the NUC to the Mytek Brooklyn DAC via USB, or
    b. Connect the NUC to my homes lover level Verizon Router

  2. Do I need a external power supply for the NUC if I already have a Sbooster (BOTW P&P ECO 12-13.2V PSU) connected to the Mytek Brooklyn DAC?