NAD C326BEE if you don't mind the look. The older 320 was reviewed/measured by audiosciencereview.com, rank quite high on the chart.
The NAD 326BEE may not be beautiful…..but it was on sale for a good price. It is built in Canada and MOST IMPORTANTLY it belts out music like...
hometheaterhifi.com
This is a review and detailed measurements of the NAD C 320BEE power (speaker) amplifier. It is on kind loan. The C 320BEE is a vintage product, dating back to 2003 I think. The BEE designation is apparently a reference to Bjorn Erik Edvardsen who was one of their designers. Can't tell if he...
www.audiosciencereview.com
For DAC, just pick one with great measurements and have the inputs you need.
Examples: Topping D50 for just under USD 250
This is the review and measurements of the secretive Topping D50 DAC. Other than a small picture and mention on topping's web site, there is no other information on it. I am in fortunate situation that Topping was kind enough to send me a D50 to review and keep. It was a bonus after I asked...
www.audiosciencereview.com
Or the Topping D30 for for a little under USD 120
Time for another bargain DAC, the Topping D30 DSD/PCM DAC. It retails for a mere $120 on Amazon including shipping: https://www.amazon.com/TOPPING-Decoder-Coaxial-Optical-CS4398/dp/B01L1SDKUQ I will do a hardware tear down later but for now, the enclosure seems nice quality and a step above...
www.audiosciencereview.com
The D30 would likely be in the same rank as the one in the A12, but the D50 has the ES9038K2M that would be far superior in specs, though the difference may only be audible for those equipped with golden ears.
External DACs offer more flexibility/portability.