I updated my stuff.
Headphones: Dan Clark Aeon RT Closed (needs no EQ, less than half cost but liking them more than my HD800s tho those have time alignment that is spooky and makes you get a real sense of space but you gotta EQ their artificial bits flat)
Headphone Amp: THX789 one of the greatst amps ever produced. Andrew Mason is a genius. Buy his amp.
USB DAC: Topping D90SE can’t say it sounds different than the DX7 but both are pretty great.
Playback Software: JRiver using Topping’s asio drivers and the its digital volume control.
I’ve wasted money on a lot of rigs over the years. This is the best if you like an accurate sound.