One of my favorite tube amp makers is Synthesis. They consistently make amps whose sound is WAY beyond one's expectation for the price. My two favorites of their lineup are the integrated amp/DAC combination--A 40 (twin KT66 tubes pwer channel) and the A 100 (four KT 66 per channel).
I own custom tube gear made by a builder in Italy, Aldo D'Urso, who has made a dazzling array of gear--he builds his own DAC, phono stages, amps, linestages, field coil power supplies, Western Electric horn reproductions. For some gear he winds custom transformers. His originals and reproduction/rebuilds of Western Electric gear is amazing nice sounding.