Thank you for your considerations marslo, most interesting, it is my understanding that it was in part the R&D involved in the development of the Rossini DAC that led to the recent V2.0 re-written firmware, amongst other upgrades, to Vivaldi. Perhaps these changes might allow you to feel more comfortable with its latest sonic profile?
Or he could try a fully decked out Golden Gate with fully Mundorf internals...Just saying!