I bought a modern single ended tube "boutique" guitar amp (I'd owned old Fender amps, some of which were single ended) and liked it a lot, and it got me wondering what single ended tube hifi would sound like after many SS amps over decades, although at the time I was enjoying a push-pull tube power amp in the rig. I read about Dennis Had and watched an interview with him on Youtube that I liked, and a slightly used Firebottle amp showed up on Ebay. After a year or so I'm still smitten, and while using it with efficient speakers and a tube preamp it simply works for me as it sounds astonishingly good. Seems to be a keeper.
Most musical, enjoyable affordable amplifier
Ive owned alot of amps over the decades, ss and hybrid and tubed! If only one of them was going to be my last and final journey into stereo i have to say the most fun and just all around musically enjoyable experience i ever had was the venerable Pioneer SA-9800 intergrated 100wpc amplifier. Their so beautiful to look at and the recording ability it has is amazing , even has a good sounding mm /mc phono to boot, everybody who listened to that amp at home was thrilled by its looks and sound.