I think you should wait and upgrade your Calypso or Atlas to Eclipse version, which will be a bit more expensive than the Signature upgrade.
What should I upgrade?
I have enough money to upgrade one piece. These are my two choices: Upgrade my Ayre CX-7emp to a CX-5-eMP or upgrade my Aesthetix Calypso to the Signature version. What would give me the "best bang for the buck?"
Existing system
Aesthetix Atlas
Aesthetix Calypso
Ayre CX-7eMP
Usher 8571