Given that I have printed at 200mm/s with an 8bit atmega 1280 - the cheapest andnastiest board on the planet.
You don't need to go into duet realms of expense.

the skr 1.4 turbo with the silent steppers - should be more than enough.
https://www.ebay.co.uk/itm/BIGTREETE...UAAOSwOQpfyjO2
great little board and even has sockets for dual z axis motors - which you need for the ender 5 (I think, looks like it has 2 z motors)
You can pickup the board, tmc steppers and a 3.5 inch touch screen for about £70.
https://www.ebay.co.uk/itm/BIGTREETE...MAAOSwE91eAcFu

https://www.ebay.co.uk/itm/BIGTREETE...oAAOSwgjVgNhhX

Usually cheaper in the states.