I use a separate DAC which uses the new ESS9032Q2M which for single ended use with the SET preamp and amp, outperforms R2R ladder DACs. (Some reviewers consider the more expensive R2R ladder DAC better for balanced output.)
I purchased a Bluesound Vault 2i a few years ago. While it does stream any classical music station in the world and other sources, it does not lend itself to storing my CD collection in its enormous memory. Calling up a composer and a symphony, overture, or a concerto is impossibly complicated because it is designed for pop songs accessed by song title and singer or group. I have to put my CD collection on a flash drive with folders for each composer and this often does not work the right way. Downloads do not always get onto the flash drive in a playable format.
What I manage to keep on the flash drive does sound spectacular with the separate DAC that can also take that disc player as a digital source.