I have experience with the Vivaldi stack and it is far far beyond the Berkeley. The Berkeley is the type of sound that has analog only people still believing digital can’t compete. I have two turntables and a fully sorted R2R system so I know that digital when done right can get very close to pure analog.
My Museatex Bidat is far better than the Berkeley Ref. I honestly don’t understand some of these online reviewers, unless they are on the take, and a LOT of them are on the take, I would say my former Metrum Acoustics Hex would easily upstage the Berkeley.