I am looking for a reasonably headamp with a Dac with an optical input

+1 @fuzztone re: Drop these days.  In fact, I just cancelled an order for some Sennheiser ‘phones from them because they delayed my delivery after already having waited three weeks for the damn things, and I ended up getting them for the same price direct from Sennheiser in only two days!  Argh.  The reason I recommended them here is because the XD-05 Plus is $50 cheaper at Drop and you seem to be price sensitive.

The Modi has all three most common inputs easily switchable. I wouldn't buy anything from Drop. Anymore. I bought a Xduoo amp they said would ship in a month elsewhere. I got it, same price < a week. With an actual warrantee.
Magi/Modi is $198, less for B-stock. Made in USA.

The Magni is just an amp without a DAC and not sure if Schiit sells a DAC/Amp with an optical input.  Go to Drop.com and look at the Xduoo XD-05 Plus for $210.  It also has a battery so can be portable if that’s ever needed.  Also on Drop, and if you can stretch to $425, the Aurender Flow is even better if it has enough power for your ‘phones.  Hope this helps, and best of luck in your search.