What DAC upgrade made you say “DAMN, that sounds SO MUCH better than my last DAC”?

The very new line to the U.S  from Underwood Wally is
Audio GD , I recently bought their New totally redesigned line as of late April 2021 the R8  MK2.
it is a very beefy 25 lbs using 3  Rcore transformers operating  in pure class A on the analog stages, and servo controlled FPGA on the digital end ,full R2R dac with 5 user adjustments . At $2k it’s  class leading IMO and I have owned 
Denafrips Pontus 2 , Schiit Yggsdrasil 2, Belcanto , Lampi  Amber 3
it took 500 hours to fully settle in having dual Femto clocks , and New firmware port on back for future upgrades which is very good to know.

@ivan_nosnibor 
Isn’t the Burl solely a A-D dac for mastering purposes? Or does it convert both ways, that wasn’t clear to me. I use the RME-ADI-FS with the Teddy Pardo power supply connected by a Synergistic Research Atmosphere Reference USB cable and balanced SR Atmosphere Level 2 cables going into my Octave V70 Class A.
The RME is stunning to me and my Audrivana files.

Emm labs over Cary for me

My Line Magnetic Tube/SS selectable LM-32 DAC.

Two years ago going from the entry Naim streamer to the dCS Bartok I traded fun for accuracy.  It left me scratching my head and holding my empty wallet, knowing I was hearing more of the recording, but it wasn't really that enthralling. After nine months with the Bartok I bought a used dCS Vivaldi stack.  I was pretty happy as it was more in all the good ways better than the Bartok (however, clearly the family sound), but I was holding my empty wallet again, thinking "I was expecting more".  It was still not the sound I envisioned. I bought that Vivaldi stack used and once I got it running I listened for a few weeks, then dug out the manuals and started through the settings. I realized that a software setting was set in which the clock was turned on and wired correctly, but the clock was not engaged. I changed the setting and that was when I had my WOW moment.  I get it now. I have been relentless in my search for that "liveish" sound I believed digital could produce. I have it now and I am extremely happy. It just costs a lot of money right now to get "that sound".