Given how sensitive you or your DAC are to noise in the network, have you tried a network isolator?Hi rabskiiii (its the only way spell checker will leave it alone)
My system is absolutely allergic to SMPSs, yet my amps are as fully SMPS’d as it gets and they work brilliantly. It’s not SMPSs per-se, it’s the cheap-as-chips consumer grade, 12 for a 100 bucks supplies that come in/with consumer grade network electronics that sound crap for all the reasons you give and at least ONE MORE. Every power supply in the network contributes its identity to the final sound you hear. Whether that identity comes from a $10 SMPS or a $3000 supply really matters and the difference between one and the other is HUGE….beyond transformational, when the rest of the network allows those differences to get to the end point.