Robert Koda - Excellent
Kondo - lovely
Luxman - superb value with some really good stuff
Air Tight - love the sound signature. I want to try the 3211 monoblocks.
Accuphase - not bad but would not rate it as high as the ones above although i haven't heard it in a while
Esoteric - used to hate it. Apparently the latest chips are a bit more palatable.
Shindo - Liquid
Zanden - Up there with the best
Soul Note - ?
Don't forget Techdas...or all the magnificent cartridges
Excellent short summaries!
I'll comment on some of the ones I owned or heard more extensively at friends/dealers:
Shindo - Lively, detailed, good textures. I really loved the original Ken Shindo designs - Monbrison, Haut Brion, Cortese. I would consider an original Giscours too.
Accuphase - Delicate, refined, good textures and detail. The Class A tend to be also more engaging with better flow. Out of the solid state ones by far the best built and reliable (Luxman, Esoteric) - absolute perfectionists and Accuphase have been fine-tuning almost the same line-up for 10 years. Moved to an E-600 from a Gicours/Cortese which should say a lot.
Luxman - Great value item. I feel the lineup lacks a bit direction - tube/solid state, inconsist design across lineup, lot of turnover of new products (which can be good/bad). Good sound and like their lively Class A/B sound. For Class A I would go Accuphase.
Kondo - Sounded spectacular and will always remember my first time hearing the Ongaku...
Esoteric - Well built digital players, but never liked the sound very much.
Air Tight - sounded good each time I heard, but not quite as special as Shindo/Kondo...