@jjss49 Not sure how the older SE model sounded, but at least after acquiring this Dac1 Reference I no longer have the urge to upgrade my DAC even if I have the money to upgrade to more expensive DACs like for example Weiss DAC-502 MKII.
But it seems like this DAC is sensitive to cabling though. I suspect those who did not really enjoy this DAC did not explore different cablings. The Oyaide Class S USB I mentioned above seemed to work well with this.
I also gained performance increase with a decent power cord. I use Real Cable Citrine with this DAC and it seems like a good match.