You can't beat St. Augustine. People come from all over the world to enjoy the rich history, beautiful scenery and take a stroll down St. George Street to gaze in the boutique shops in the oldest city in the nation. Even as a local I can't get enough of the it all. (Last weekend my husband, daughter and I rode the trolley and strolled around downtown) It sounds to me like you already have your heart set on St. Augustine. There are plenty of golf course communities and I would be happy to give you more information if you would like.
Watson Realty Corp.
St Augustine and it's historical downtown are very unique. Amelia Island is similar but smaller scale. Our beaches in the south end (Anatasia Island) ate powdery sand. As you move up the coast to Vilano and Ponte Vedra you tend to more shell type sand. There are several golf communities to choose from, private, semi private and public. This is not a densely populated county so crowds and trafic are not much of an issue. Orange Park and Fleming Island have their benefits but are a more densely populatated in comparison.
There are several other issues to consider, taxes, fees etc... Please feel free to contact me directly for more details and if you'd like I have several useful maps and relocation packets I could send you.