You could also get a DDC (digital to digital converter) rather than a new DAC. The DDC can take the USB input and clean it up and reclock it and send it to your DAC via the AES/EBU input. I added a fairly inexpensive Denafrips Iris and felt that it added some clarity and bass to my system that I already thought was pretty good.
Also, the Denafrips Pontus is on the 15th generation so I'm not sure why you're looking at a Pontus II. The price is low and the Pontus 15th is essentially the same as the Venus 12th which is a DAC previously costing about $4,000 that you are getting for less than $2,000. Check out USAudioMart for deals on the DDC and DACs if you are interested and also Jay's Iyagi video on the Pontus 15th he put out this week.
Finally, the question is whether you are looking for Delta Sigma or R2R stuff. You might also include the Holo Spring or a used May if you can find it. I've also been looking in this price territory and I'm finding some interesting lesser known stuff like the Audial DAC S5b which got a rave review from Elite Audio (YouTube) on 11-29-23. I haven't heard this DAC but the review(s) sound like I would like it and it has all the inputs you want including the i2s.