Maybe consider a 6sn7 preamp and 250 watt amp that doubles in power. With $7500 you could find a Don Sachs, Supratec type preamp and an older Pass Labs, CJ or others. I tried BAT, ARC, Rogue they were nice but felt they were more in solid state territory, in case that’s what you are trying to avoid. Just make sure impedance matches.
i had a Don Sachs pre and amp very natural with a great layered sound stage, the preamp matched with solid state very well.