The Fostex F200A is a "tone heavy", warmer, and very robust driver with a flavor decades ago. Not anemic, thin, and detail oriented as is or currently in favor.
Yes, also owned a Jaton RC2000S which I used until about 2 years ago. I bought it on a dealer recommendation. Had a nice feature set, but the sound was totally unremarkable.
I'm 0 for 3 trying tubes of late, so not ready to get back in the saddle at this time.
My first foray into true high-end audio was with LS3/5a clones in the 70's, yet have just picked up a pair of Temple Audio mono-blocks direct from Cheshire England (my first British electronics). They are tiny, well built digital amps with a clear dynamic sound.