Pre owned Octave V70se or V110. Built like a tank and some great protection features in the event an output tube fails. If you want an even lower noise floor and a bit more headroom add a black or super black box. I had both and the V110 has a bit more 'control' of the music. The beauty of tubes you can change the sound from warm to linear to punchy just by swapping tubes.
Good Luck
Good Luck