It would be misleading to give you a brand and model.
What do you figure your daily (fresh) water usage will be?
What is your current energy budget surplus? How many Amp-hours do you have surplus? Do you have solar panels, wind generator, or (shudder) gas generator? Do you have a DC refrigerator?
If you get a DC-powered watermaker, figure on one roughly Amp-hour per gallon produced (depends on the brand, of course, but as a ballpark). If you get an engine-driven watermaker, think about how many hours a day you'll run the engine at low load, and the effect that will have on the engine's health (to say nothing of your nerves).
What are your space requirements? A big block of free volume argues for a pre-built "console" unit. Otherwise, it may make sense to get components that you can shoehorn in where you can. But be able to get at the components, because the watermaker will be a high-maintenance item.
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