Best DAC for my system?

I have created a separate linear power supply for my Khadas tone board generic edition, and I bought a Nordost USB cable.
Well... this combo greatly improved the sound quality of the Khadas.
I have done 2 blind listening tests with friends, against the Schiit Gungnir and the Denafrips Ares II.
Nobody, I mean nobody was able to identify the Khadas. LMAO.
So clearly the winner is the Khadas tone board generic edition if we compared the sound quality and money.

Have you tried the DAC on the MX119? That would be the first thing I’d try. If you still feel you need an external DAC, I’d suggest upping your budget, plus consider used. 

crn3371..yes I compared them and the Node 2 sounds better.  The MX119 was a little dull and not as defined.  Thanks for the suggestion though.

Talk to Tommy at the Digital Amplifier Company (DAC) the DAC DAC HS is exceptional. Contact him for a price he always has demos available. 
https://www.cherryamp.com/

Seems you have about 7.5k to 8k invested in your system so far... You owe it to your self to upgrade your source, streamer/dac... 2k to 2.5k seems about the right balance with your current kit... Benchmark and Chord are good suggestions... You might also look at Lumin... And some room tuning/treatment would not be a bad idea at this point if you have not already done so...