"Fast sounding tube amp" with plenty of power? any?

Transcendent Sound SC150 monos. As fast as solid state.
I should know. I own them and have used many solid state amps (McCormack, Sim Audio, PSE, Meitner, Adcom, to name a few). I am auctioning my SC150 now on audiogon because I am using a lower power OTL amp with my Merlin VSM-M.

Among the fastest amps in the world are Atma-Sphere's line of OTL tube amps, which includes the 220-watt MA2 MK2 monoblocks. Atma-Sphere amps boast a slew rate of 600 volts per microsecond! Very few amplifiers even list their slew rate any more, but 50 volts per microsecond is typical for solid state, and 200 volts per microsecond would be quite fast. Tube amps are often down around 15 volts per microsecond. The only amps I know to be faster than the Atma-Spheres are the Spectrons and Goldmunds, but they don't have the magical midrange and relaxing voicing of a good OTL tube amp. Other OTL amps are probably quite fast as well - I just happen to be familiar with Atma-Spheres.

Atma-Sphere MA-II's

Wolcott Presence Monoblocks..220 watts of el34 power, not your stereotypical tube amp.

In my post above, that should have been "Spectral" instead of "Spectron".