This guy did quite an extensive test and review of many high end DACs. it has been a while since I watched it but I believe he offers some very good information about the type of DAC you're searching for. This is only the last video of an entire series.
https://www.youtube.com/watch?v=dNyxzUkA9zU
https://www.youtube.com/watch?v=dNyxzUkA9zU