In my system I put DAC first and use an iFi Zen Stream with iFi's $250 power supply, $50 to use fiber optics to filter out ethernet noise and it all sounds very musical. I will replace the iFi when I have the money, but I'm happy with the iFi.
This is terrific for you if this arrangement makes you happy. Certainly there are alternative solutions and beginning with a higher level streamer is one of them. iFi will be sufficient for some listeners and not for others. Individuality/case by case , YMMV etc.
Charles