Nothing at all uppity about your question and if you spend a lot of time with your system, not a bad way to invest your gain. I take your point that you don't want to get into streaming, etc. so will try to give you some thoughts that are responsive to the question you asked.
if you like the magico sound the first thing I would consider is going up a rung in terms of quality while staying with Magico. Maybe consider investing in the S5, which I have heard and consider to be outstanding. That way, you are not taking a plunge into the unknown, you are getting a speaker that will be similar to what you have except more and better. I've recently had a similar experience with Sonos Faber. I had the Serafinos and first considered just moving up to Amati in the same line. This did produce a solid gain, but when I auditioned the next level up into the reference line, the improvement in sound quality was exponential and for me was the best allocation of my upgrade budget.
that would still leave you with a good chunk of change to experiment with other upgrades, but I think you might find the biggest gain by focusing on the speakers first. after that, I would consider a high-end DAC. I have a DCS, which I like very much, but most everyone will probably endorse whatever brand they have. I think there are lots of good choices, and if you have a chance to visit some dealers, you can give yourself some options.
you have a fun problem to solve. good luck!