Hey south Florida! I lived in Boca for 18 years.
I have extensive marine diesel experience, although have never owned MAN diesels myself. They are generally lighter weight and more maintenance than CAT or Detroit DDEC's. Somehow, I think MAN may be a division of Mercedes-Benz. A friend had a 60 ft Hatteras with MAN's but trades out every year, so it is hard to say what the long term performance would be. At least he will go fast while they last.