Rafe Arnott has posted a review of the darTZeel CTH-8550 integrated amplifier (~$25,000) at Part-Time Audiophile. His conclusions:
“hile it didn’t necessarily present the deep, blossoming bass that I typically gravitate towards (as from EL84, 300B in particular, and some 6L6 tube-based amplifiers), this racy-red Swiss powerhouse sounded far closer to the type of sound I associate with valves than just about any other transistor-based integrated amp I’ve heard has.”
You can read the full review here.