Up here, we don't need to worry about the water. It won't damage the machine. It's proper northern water, no filters or tablets requiredJust checked our water online, it’s moderately soft whatever that means.
Unless you are hammering the machine, go middle of the road. We are on a Beko one, 5 yrs and going strong. Miele, Bosch, Samsung etc will be better machines but are they worth the extra if you are not pushing them to the extremes? I liken them to tyres. Do you need Continentals or Michelins if you are doing low miles and not at high speeds?