I think Marriott as a brand goes out of the way to make your milestone date more special. My wife and i recently celebrated 25 years of marriage and visited the Marriott in Key West. i informed the staff member who was working along with my marriott rewards card and we got a great room and a basket of goodies and congratulations. Very nice. I'm sure the GV would do the same for you. And for a HM, that is the Marriott Villa that i would recommend.