A few options...Check out the Art Audio Opus 4. Tom designs all of his amps to work with horns as the core offerings are 300Bs and he is highly conscientious in terms of noise. The Opus 4 is a KT88 based unit and his gear will compare with Jadis. Would be brilliant with a DM VPS preamp.
For Class A, check out Sugden. Not huge power but very good sound and you don't need huge power. Only issue is that it is also Class A and may be more of the same.
AVM...the SA6.2 and PA5.2 would be a good match. the PA5.2 has a tube input stage and offers a little bit of sweetness while the SA6.3 is a warm class AB and will give you plenty of slam and refined bass without being bright.
For Class A, check out Sugden. Not huge power but very good sound and you don't need huge power. Only issue is that it is also Class A and may be more of the same.
AVM...the SA6.2 and PA5.2 would be a good match. the PA5.2 has a tube input stage and offers a little bit of sweetness while the SA6.3 is a warm class AB and will give you plenty of slam and refined bass without being bright.