I have read reviews where a Primaluna tube amp was a good match on the Hyperions.
I know 6moons raved about cyber 211, some people picked up on that review and bought it.
But 6 moons didn't compare everything on these speakers.
For Primaluna i can find a delaer in my country, no problem, i should get one at my home for an audition.
While i'm at it, the dealer has PS audio to, someone prefered this over the Primaluna but that could be a very personal opinion.
i can only try and find out.