Rogue 66, Blue Circle 21, Kora Equinoxe

Whats the top value in tube pre today? Thinking of pairing with SS power(Marsh A200s). Anyone compared any of these?
Haven't heard the Kora. The Rogue is great. Hard to do better. The Blue Circle is at least one step above it, however. I think Blue Circle is the most underrated name in audio right now. Give a listen to their products, and see if you don't agree with my feelings on Blue Circle. At least as good as 99% of what's out there.
Rogue 66 is an awesome value.
$for$ the 66 is a super value.