Rwd, congratulations on you decision to order the Rhea. I hope you will enjoy it as much as I enjoy the Io; its a beautiful phono stage.
The Calyspo will give you another improvement in sound quality, but you may want to live with you new Rhea phono stage for a while and think about what changes to your system will really improve the sound you want to achieve relative to your listening priorities. Your system will be at a very high level. Changes from here need to be matched carefully against your listening priorities and synergies with either (a) the rest of your system or (b) your system as you want to have it evolve from here. I think the sound you will get from the Rhea may lead you to consider some directions you might not currently contemplate.
Best wishes,
The Calyspo will give you another improvement in sound quality, but you may want to live with you new Rhea phono stage for a while and think about what changes to your system will really improve the sound you want to achieve relative to your listening priorities. Your system will be at a very high level. Changes from here need to be matched carefully against your listening priorities and synergies with either (a) the rest of your system or (b) your system as you want to have it evolve from here. I think the sound you will get from the Rhea may lead you to consider some directions you might not currently contemplate.
Best wishes,