Tube Mono-Block Recommendation


Currently I have the Bob Carver 305, Looking to upgrade to something else in the Class A Region. Budget is around 12000 US, New or Used any recommendation.

I like the Amps, to be fast, Accurate and musical as possible. Giving me close to Transistor Amp Clarity but with the magic off tubes.
dragon_vibe
Wyetech labs sapphire they are driving a friends sonus faber amati future incredible sound for 18 watt 300B
Our MA-2s might suit. They make about 220 watts and are very fast (600V/usec).
Atmasphere I did consider OTL but reading online about OTL amps being unreliable, tube eaters, get extremely hot and expensive to maintain is sort of pushing me out and trying to consider something else. Want something more plug and play.