If you are going to Charleston for any length of time, you must play The Ocean Course on Kiawah. It has a habit of humbling one's self.
As far as restaurants are concerned, here are a few more:

82 Queen
Poogan's Porch
High Cotton
Blossom Cafe

For a good breakfast, I venture out to Isle of Palms to Acme Low Country kitchen. Love their biscuits.

As long as you keep doing what you've been doing, you'll keep getting what you've been getting. - Martin Hall