Hi Lloyd,
as you know, I have the Zanden, too.
But if I would compare a classic CD playback against a streamer, I would take a modern DAC. Of course it could be a R2R ladder DAC, maybe some tube DAC (Lampizaror maybe), but a solution with clocking and of course for high resolution, otherwise more than 50% of the streamed music is not playable.
This is my problem, too, a special DAC like the Zanden is just for 16/44.1 or 48, nothing else.
If clocking, I am a big fan of Mutec. MC3+ clock, maybe 2 or 3 of them cascaded, and the matching Mutec REF 10 10MHz Reference. It is a fantastic combination, that I have used with Innuos Zenith and Linn streamer In the past.