You can use the ME-1s with MADI, Dante, Waves Soundgrid or Ethersound, via an ME-U hub. You could still use a different console via Dante into an ME-U>ME-1 just as with the D400>A320, but without having to use any extra hardware until then.
If you’re going to have a Dante card in the console anyway then it’s less of a difference, other than the extra 8 channels and the cost of the D400 to convert the Dante to A-Net. ME-1 will take your channel names from the console channels rather than having to type them all in again every time you change your patch, but if you don’t change it much that shouldn’t matter.
Chris