Ended up with a Mayflower DAC+AMP
https://www.mayflowerelectronics.com/store/p19/Objective2___ODAC_Combo_with_Rear_Power.html
Driverless and plenty powerful.
I got a pair of HD 650 cans and need a matching quality DAC/AMP for them. They are 300 Ohms of nominal impedance and can take 500mW @ 300 Ohms, so they need quite the "horsepower" to reach their potential. They also got jack in both 1/4 and 1/8 inch so no problem with only big jack plugs fx...