If you like the PS Audio DSD, my customers usually move to one of three brands depending on budget. Meitner MA3, Playback Designs or Bricasti. The M1 has been a popular choice but the M21 is awesome in that it is an M1 S2 AND it has the R2R.
regarding the streamer card, this outperforms most streamers/DACs and does this because it is solidly made and is connected internally via I2S. I2S is advantageous as it connects the clocks in a superior way and leads to better sound due to reduced jitter.
the MA3 is a step up from the DSD as well and is modestly priced compared to Playback or Bricasti with a list at $10.5k. The Playback MPD-6 is amazing but with card, is $18k.
full disclosure. I am a dealer for all three brands but have personally owned the DSD, had multiple DSDs in on trade for direct compare.
Regarding other recos in this thread that I have owned and spent time with, as wonderful as the Weiss 501/502 is, the unit is a bit brighter than what you are used to. The Weiss Helios is smoother sounding but is a big step up in price to $22k. I find dCS and Lumin also to be noticeably brighter than what you are used to.
I just hooked up the Esoteric N-01XD a few minutes ago and I have not put it through its paces yet but reminds me of the Weiss Helios tonally. It is neutral and pleasant sounding. I only listened to a few tracks but this might be a good fit as well.