Ok, just a bit of warning… I did this. From what you said… well sounds like me. You can see where I ended up (click on my user ID to see my headphone system).
It starts this way… then, well it doesn’t have the bass… or the detail.. you have excellent headphones, to get what you want out of them, it is going to require a great tube head amp… think Woo…WA6 or WA6SE.at least. A good DAC… and, well PCs are not good at streaming. But you can probably get by with it. Power conditioning, interconnects.
Watch out… for me… well it cost a lot.