@dkerr For amps I have Coincident Turbo 845SET,Art Audio Carissa Signature 845SET, custom built 300B SET monoblocks, Prima Luna Dialogue Four (modded with Takman resistors and Miflex and Mundorf capacitors, use exclusively with EL34 these days), Coincident Statement line stage, Klipschorns (extensively modded, only bass enclosure stock).
I also had Musical Fidelity M2si ss integrated amp in for audition at same time as Hyperion, MF sound signature light and lively compared to Hyperion. All my amps more modern sound SET in nature, not rolled off on top, tight bass. Klipschorns, and all Klipsch generally thought of as bright speakers, mine far more refined, but definitely not dark.
I really dislike criticizing equipment, but I have to say, Hyperion had perhaps the most apparent sound signature I've ever encountered in an amp. I've also been through many other push pull tube and class A ss amps over many years, none, with perhaps a Conrad Johnson MV-55 were quite this tilted towards the warm. It wasn't just the sound signature that bothered me, it didn't resolve very well either, smaller soundstage, less dimensional imaging, obscured lower level details. I actually thought the amp broken or no burn in at first. Both were accounted for, no issues here. For what its worth, guy I purchased from had perhaps seven, eight amps in house, this was the only one selling, and he didn't keep long.
The only way I could see Hyperion working is in extremely up tilted system and/or for someone who enjoys warm syrupy sound. For context, In spite of my preference for SET tube amps I prefer slightly to the analytical side of neutral, Hyperion on far end of warm in my system and for my ears.
I've recommended the MF2si any number of times to those seeking a nice sweet sounding ss integrated. Don't let the $1k price fool you, relatively low powered ss has always worked best for me. I'd for sure check into the First Watt, would be my first choice for low powered ss, many flavors available Still, based on your stated sound preferences, I'm not sure any ss will deliver the full measure on those.