1. Sonic Frontiers SFD-1 MKII
2. Bel Canto DAC1
3. Musical Fidelity A3.24
These are all Redbook CD (pcm) only dacs.
I’d place them in that order that you’ve got, had them all at one time or another, owned or for mod work.
SFD-MkII R2R Multibit, UA D20400A dac and PMD100 hdcd, very nice, but if the dac ever gives problems it becomes a door stop then.
BC DAC1 another good R2R Multibit dac with PCM1704 dacs, but sadly no hdcd, and it had a little noise, if it had hdcd and no noise it "could" equal the SFD.
The MF A3.24, was "nice" measured well, but boring, and it’s a Delta Sigma dac, no matter what mods I tried, I could get it to "jump" like good Mutibit dacs can, one thing in it’s favour which Delta Sigma dacs tend to do, is it was kinder to bad recordings.
Cheers George