Roon DSP Sample Conversion Settings for Pro-Ject Audio Device

Hi Rooners,
i am wondering about the best setup for my roon ready Pro-Ject Stream Box S2 + Pro-Ject Pre Box S2 Digital.
I use the Roon Server DSP for this:

I am not sure if it is a good idea or not - other ideas are appreciated
The S2 Pre Box displays now DSD64 and no more PCM as input signal
I think i can hear a slight difference in sound a little more open in the high tone range