Uber,
What are you using to control the Vault? Tablet, phone?
I'm using an Auralic Aries w/ Femto clock, and control it with my iPad via Roon. Auralic has it's own app, Lightning DS which I only use for setup, which I believe you can only do via an iPad at the moment.
Anyways - the Aries has USB, Toslink, Coax, AES out (pick your poison) and is only a streaming transport - which of course is all you need, since you're using the Lyngdorf's fantastic DAC.
I believe Auralic and Bluesound are neck & neck with each other regarding internal circuitry processor blah blah, but the Aries does have the Femto clock, and no DAC (extra hoopla inside), plus a very nice linear power supply, which should be an upgrade to your Vault.
I haven't used any Bluesound products, but I had the Aries Mini (no Femto/Built in DAC) and the Aries I have now sounds noticeably better.