I'm currently gathering information from a breeder. I'm getting the impression that if the puppies are BAER tested and their parents are healthy and have good temperaments, then the puppies should be fine and relatively healthy throughout their life with proper care.
Best thing you can do. People with decades of experience owning/living/showing/competing/breeding the breed can answer your questions a lot better than any of us on here. Research for yourself, ask lots of questions (especially tough ones relating to any concerns you may have), do your homework and bounce things off your breeder. Good to see the sire and dam in person, spend some time with them and see their temperaments for yourself as well as the puppies. Make sure the breeder contract (read it over carefully) guaranties against/takes responsibility for the more common genetic diseases with-in the breed that are inherited - that is a must as you do not want to be on the hook for breeder malpractice.
Good luck. My Great Danes love Dalmatians, we've met some nice ones, but it's a breed that you have to be prepared to take the good with the bad with. But then again, you can say that for any breed.