Aavik I-280
I owned Luxman 590 AXII and auditioned Diablo 120 at home.
Also, compared it against Pass Labs INT 250 at a local friend’s home .
I preferred Aavik and ended up buying the U-280, which is basically I-280 plus a built-in Dac. Yes it is class D but you would never know unless someone told you. It sounds closer to a hybrid between tubes and class A.