If you like the idea of a kit (or they will build a complete amplifier), I agree with the Dynaco design option. The company Tubes4hifi has kits and fully assembled amplifiers based on some of the most popular Dynaco products: ST-35, ST-70 and ST-120.
The ST-70 uses EL34, 6L6, or KT-66 tubes power tubes, and puts out 30ish WPC depending on tubes. Uses 12AU7 driver tubes, and a 5U4G rectifier. Completed amplifiers are about $1,650 with all tubes.
I own their VTA ST-120 amplifier, that I've had for 5 years or so, and I can tube roll power tubes (6550, KT-88, KT-120, or KT-150), 12AU7 drivers and 5U4G rectifier. Power varies with power tube choices, but I think the 6550s are around 45 WPC and up to 80ish WPC with KT-150s. Completed amps with all tubes are $2,050 with 6550 or KT-88, and more with KT-120s and KT-150s
I also have Aric Audio and CODA amps, but will not get rid of the KT-120....not sure if it is what you are looking for, but they are really good amps