Look at Bob Carver Crimson 275s. 75 wpc stereo tube amp made in USA with point to point wiring and some Carver tweeks that run tubes cool. They are A/B push/pull with feedback. They come with a 10 year tube warranty.
A lot of high-enders poo poo Bob Carver, but he's an electrical genius and his current offerings are made here. I have his Raven 350 monoblocks and they sound great.
If you want to really get the ultimate tube sound and go the SET route, consider Decware, also made in US and a little higher endish, but affordable, and money back trials available, as with Raven audio:
https://www.decware.com/newsite/homepage.html
A lot of high-enders poo poo Bob Carver, but he's an electrical genius and his current offerings are made here. I have his Raven 350 monoblocks and they sound great.
If you want to really get the ultimate tube sound and go the SET route, consider Decware, also made in US and a little higher endish, but affordable, and money back trials available, as with Raven audio:
https://www.decware.com/newsite/homepage.html