Try the original Parasound A21. Great value. I recently tried a nearly 20-year-old A21 against the new A21+. The original is clearly better. Even from the listening chair the old design is audibly lower in noise and distortion, despite what the specs would have us believe. Independent measurements back this up too.
Don’t bother with newer designs unless you want something very efficient and lightweight, such that would necessitate Class D, Class G/H or THXAAA. All other amplifier topologies reached full maturity decades ago.
An older Krell or Threshold amp mated to a good preamp will produce better sound than most integrateds under 4 or $5K.