I've heard the Chinook and Rhea, in systems I know well though not the same system. I've not compared them directly but did compare each to a (much costlier) Doshi Alaap. The statements below relate my impression of each vs. the Alaap. As a comparison this is unfair, but knowing how each performs against a higher fidelity standard might be useful. So, compared to an Alaap...
... the Chinook was highly susceptible to microphonic pickup and amplification of airborne vibrations. This happened with several different tube swaps. If we played the music at all loud, the Chinook inserted quite a bit of feedback-based mud. If one's setup permitted the Chinook to be isolated/protected from external sounds, including sounds emanating from the speakers, this would not be an issue, in which case the performance is pretty good.
... the Rhea's useability/adjustability are a joy but compared to the Alaap it sounded fairly muddy at all volumes. This was the original Rhea with the stock tubes.
Haven't heard the Whest. Hope this helps.
... the Chinook was highly susceptible to microphonic pickup and amplification of airborne vibrations. This happened with several different tube swaps. If we played the music at all loud, the Chinook inserted quite a bit of feedback-based mud. If one's setup permitted the Chinook to be isolated/protected from external sounds, including sounds emanating from the speakers, this would not be an issue, in which case the performance is pretty good.
... the Rhea's useability/adjustability are a joy but compared to the Alaap it sounded fairly muddy at all volumes. This was the original Rhea with the stock tubes.
Haven't heard the Whest. Hope this helps.