The digital out from a Squeezebox Touch has very respectable jitter, Orr lack thereof. No idea how it compares to your own suggestions but it does have a convenient interface and might be a worthy addition to your queries.
Starting computer audio
Have ThetaDigital ProBasic IIIA dac. What would sound best (have less jitter?), driving the dac with a Sonos Connect or connecting the PC to the dac with a Bel Canto Link usb-to-s/pdif converter, which reclocks the stream. Both are the same price. I do not need multi-room capability, but the Sonos offers convenience and control.