Best MFD for existing system

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Hello,
We recently purchased a new to us boat that had an existing Raymarine system using a C80 classic series MFD with analog radar, a DSM 300 a p79 transducer and a Raymarine gps antenna. Recently we added a E80 classic MFD with a separate Raymarine GPS antenna with plans to add a Raynet high speed network and have the DSM go to both machines as well as a SR100 weather receiver.

Recently we have become interested in upgrading to a newer unit in place of the C80 classic but are unsure of which MFD would fit best in our system using the DSM 300 and the SR100 (each Machine having its own GPS antenna) Touchscreen would be a big plus, as well as the ability to add different senors in the future.
Thank you