Another vote for the Luxman L-590AXII. After more than 20 years of messing around with more than a dozen of amp combinations both integrated and pre/power, the Luxman beats them all for sheer simplicity in a one-box (minus extra cables) and of course, sound quality. It is high quality at a price that’s not too astronomical. I also own a Naim separates system and another integrated amp but the Luxman is the new reference that gets to stay in the main system.
Good luck.
Good luck.