I think the op should listen critically to his $400 DAC, and then a $1000, $2K, $3K, heck even a $30K DCS. I wonder how many people have done a blind comparison side by side of a $400 modern DAC with a DCS, or maybe a Mola Mola, great engineering in both of those. I would highly encourage. I expect it will be enlightening.
Wouldn't you love to see a reviewer do a comparison unsighted of a bunch of DACs over a wide price range all with similar design outcomes? I remember that Passion For Sound guy did one. Then he spent two more videos trying to justify why he could not hear a difference. Good times.