The Seaboard GRAND can be played without the computer.
Make your sounds on the computer, then transfer them to the Seaboard's on board memory, disconnect the computer and play wherever without the computer.
Then, you can use any Seaboard with hardware, like for example the MPE compatible Deckard's Dream, so in essence you get a sound that is very similar to the CS80, and all the expressiveness (and more) of the real CS80.