The Schiit Bifrost 2/64 might not be old enough for your needs (!) but even bought new costs far less than a lot of stuff recommended here, and is great DAC crammed with useful features that is "future proof" as it's easily upgraded. Its proprietary "Nexus" input I use with a Schiit Urd CD transport sounds astonishingly good, and its sp/dif from my streamer is great sounding. Its sound is on a par with and even exceeds much of the otherwise overpriced stuff on the market.
