I got the RME ADI-2 DAC and it sounds excellent. The sound is very fluid and smooth compared to my old Pro-Ject Pre Box S2 Digital, but despite this have more details. The clarity of the sound is on a much higher level. And the DSP and configurable auto-adjusting loudness function is awesome, even at very low levels the music sounds full and complete.
I would guess that “analogue” lovers would not like this DAC though, its extremely neutral and open and highlights both the good and the bad. But if you want your HiFi to reproduce the music as faithfully as possible (which I do), its an excellent DAC as far as I can tell.
Only one problem, I can’t get DSD over toslink to work from Roon. I play from computer (Realtek ALC1150 chipset) and it does not support 176khz, so maybe this is the reason. I tried both native DSD and DSD over DoP. Maybe @brian can shed some light?
Btw, I compared toslink (cheap cable) with USB through Allo USBridge and behind fiber. I did it by letting Roon play same song to both zones and just switched between input on the DAC, and for the life of me I could not tell them apart. So I decided to stick with toslink for its simplicity (and fully galvanic isolation).