Hi Dan...I am also interested in the Calypso!! I also have the Rhea (all original tubes and they sound fine). I am curious to know how you feel about a "no mono" and balance capability on the Calypso? I am anxious to hear more form you as the tubes have more hours.
My Rhea's new partner arrives today
Just bought it here on the A'gon. This is a bit of an experiment to see if it might be a better match with my Rhea phono stage thus replacing my current pre, a BAT 50SE. Don't get me wrong. I'm very happy with the BAT. I don't expect a big difference between these pre-amps, but I'm hoping the Calypso and Rhea together will add more depth to the music. If the Calypso stays it will allow for tube rolling where the BAT does not. So I'm hoping some other Aesthetix owners can offer tube suggestions.