You would need the HDZ not a Z-plus for an 80mm spindle as they are very heavy. If you dropped down to a .8kw 65mm spindle the Z-plus would be fine but you will be punishing the lead nut on that Z plus with a 80mm spindle.
If you go with the HDZ and HD mount buy a cheap feeler gauge set off Amazon and take it apart and use the needed gauge behind the HD mount to get the perfect tram in the Y axis.