This might just be the Holy Grail. One amp with four tubes configurable four ways (single ended, tubes 1&2 Class A, tubes 3&4 Class A/B, or all four) for two to thirty watts, plus pentode triode switching for more power options, without the necessity of a tone sucking attenuator, or worse master volume. There's a slew of preamp and boost settings, and it even has a send/return effects loop.
But British workmanship don't come cheap in this country, and for the price you might be better off with several application specific amps. Especially considering the elegance of simplicity in circuits, keeping tonal paths clean, and the ease of repairs.