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SubZero is quite expensive, and also quite nice; mine has a service display behind the vent to see current status and trouble codes). They also keep the same models for a long time. This should help with parts availability.

I did have a problem with the ice maker freezing up, but reading the service manual figured out that the drain heater just needed to be tweaked a bit (it also doesn't hurt to turn off the ice maker when nobody is going to use ice for a while)

Considering the possibility of my refrigerator doing finishing moves is an extra bonus.