In addition to what djones51 suggested, hardwired Vault2i to your router using a good quality Ethernet cable with RJ45 connectors. Next step would be to subscribe to Tidal or Qobuz for high resolution streaming. They both offer 30 days trial.
To answer your question, your CD rips on Vault 2 should sound decent, lot of it depends on RCA cable and AV processor you’re using. You would connect Vault 2 (RCA outs) to your processor CD Input not output with a RCA interconnect cable. Mind you, folks here have achieved better sound by connecting Vault or Node 2 with an external DAC.
I own a Vault 2 and use it mainly for CD rips and as a back up to my Aurender streamer.