As well, I used to have a PS Audio PerfectWave transport, recently upgraded to their DirectStream transport, both connected to the DAC using their I2S interface (HDMI cable), and have been very pleasantly surprised at how much more detail in albums I've enjoyed for years that becomes available with that combination.
I used to have the DirectStream DAC as input to a McIntosh MAC6700, after upgrading to separates, into a C50, now a C2500 preamp, using the balanced interconnects. It seems that PS Audio & McIntosh work very well together.
No desire to change my setup!