I've always liked the Maccormack DNA designs. They also have the benefit of a solid upgrade path through SMC Audio upgrades (Steve Maccormack's new company). Happy listening!
I don't know your speakers, or how much power they like, but I 2nd the advice as to C-J SS amps, or McCormack. Lots of used C-J SS amps, MF2300, 2250, etc. should be under $1K--just do some research on the various models. And McCormack--DNA .5, or 1.0 depending on how much power you need.
I have a slight problem with this concept. A used 8/9 $$ amp only shines with a good front end and good speakers. I just don't think "this" 8/9 $$ amp, is going to elevate lesser quality items. I do think there are several 8/9 amps that will sing;along with good stuff, elsewhere in the chain.
Look for a Forte 1A or 4, about as good as a solid state gets under $3k. I have owned almost all of them including Pass X350 and McCormack DNA-2 Deluxe, Forte is as good or better.
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