Schiit Freya with some really good tubes? Amperex 6sn7 maybe?. The Shuguang Black Treasure
6sn7 are big and require a raiser adapter, but they are warm sounding and very nice.
https://www.youtube.com/watch?v=z-kQaCdjylc
https://www.youtube.com/watch?v=RltJw004j3c
Conrad Johnson PV6?
https://www.youtube.com/watch?v=z-kQaCdjylc
https://www.youtube.com/watch?v=RltJw004j3c
Conrad Johnson PV6?