Absolutely. Refurbished Scott, Dynaco, Eico, Heathkit, Knight, Hammond organ, etc. vintage tube amps.You don't have to turn it up to loud levels to hear full sound and decent bass. Tubes are the low cost way to get harmonics/which IMHO is the heart of music. Autospec and Cjkinpa do great jobs and I can recommend them both highly.
El cheapo sleeper amps....
I have an el cheapo intergrated amp non-es Sony from the late 80s-early 90s era and Im puzzled why this relatively modest amp is such a stellar performer...and the phono stage is above average as well...any other sleeper el cheapo amps that out perform their modest intentions?