My system for the last few months consisted of the following.
FLAC files on SSD -->> Bryston BDP-1 streamer -->> Bryston BDA-1 DAC -->> Schiit Freya+ Preamp ->> Pass XA60.5 monoblocks -->> Wilson WP 6
I decided to remove the Bryston BDA-1 and Schiit Freya+ and replace them with a Wadia 15 DAC. I am only a few days since the change, but it is very clear that the bass is tighter with the Wadia and everything just seems more relaxed. Time will tell though.
I was a little leery about using a DAC/Preamp combo (Wadia 15) since I have tried this before with a much newer Wadia 321. The experiment with the 321 did not end well., but things seem to be working out fine with the 15.
Marvin Gaye has never sounded better in my house.