I had the Berkeley Alpha (non-reference) DAC, then the Alpha (non-reference) 2 DAC which sounded smoother, though slightly less detailed than the Alpha 1. It took me a while to appreciate the 2 as an improvement, but after I got used to the 2 (couple months) I reinserted the first version (which I still had) and greatly appreciated the Alpha 2’s more analogue sound. Then I upgraded to a Berkeley Alpha Reference 1 and - wow - what an improvement in every way. Just a great sounding piece of audio gear. But then I went to using a music server, and the Berkeley DACs didn’t do DSD so I moved on.
Never tried a Reference 2 but I’m sure it sounds wonderful. Enjoy in good health !!!
FWIW my system at that time my system was Ayre cx-7e MP CD player, Berkeley Alpha/Alpha 2/Reference 1 DAC, Ayre KX-R 20 preamplifier, Classe CA-M600 monoblocks, B&W 800 D2 speakers. I look back on that system fondly, so much so that I fried three of the D2’s tweeters playing so loudly (single with no kids at the time). Even though I was in the warranty period B&W told me I had to start buying any more blown tweeters

And on to a whole new system I went ....