There are a few things out there used that would probably catch my attention, given your parameters (hope I stuck to them!):
https://www.audiogon.com/listings/lisab24j-black-ice-audio-f22-50wpc-balanced-integrated-tube-amp-tube
https://www.audiogon.com/listings/lisada0b-plinius-8200-mkii-solid-state
https://tmraudio.com/components/integrated-amplifiers/ear-yoshino-8l6-stereo-tube-integrated-amplifier-esoteric-acoustic-research/
https://tmraudio.com/components/integrated-amplifiers/vac-avatar-super-stereo-tube-integrated-amplifier-mm-phono/