DAC connection to computer

@8th-note I am right with you on the not hearing any significant difference between my computer to the DAC and a much higher cost individual streamer/more expensive DAC combo. 

I read some posts on this site about the use of a DDC.  So I bought a DDC (Denafrips Iris) which I tried which was a greatly lower cost tweak. I believe (can't be sure because I can't AB test it like I did computer/old DAC vs. expensive DAC/separate Streamer) I am hearing some significant differences such as clearer more pronounced bass and some detail without the digital glare in the upper range. My belief is enough to feel that the sub $500 cost was worth it. 

@8th-note You can use a phone or tablet to control foobar2000 in your existing setup. This thread has a few suggestions.

USB. No one yet explained any physical concepts of "bad sounding" PC. You can use reclock/DDC if you are really concerned with "noise" coming from the PC.

Use HDMI.  It delivers bit-perfect digital audio to the DAC.  Only from the DAC to the speakers is quality an issue.  The data that goes into the HDMI is identical to the data that comes out of it, unless something is very wrong with the cable.