Many thanks for the dining suggestions for DelRay Beach. It's been a month but finally am reporting on our trip.
We ended up having dinner twice at Boston's on the Beach because it was so good and within walking distance of our hotel. Excellent lobster! Reasonably priced wine. Dessert was mediocre. The outside dining was just perfect on a not-too-hot night.
We also had lunch and drinks at Peter's. Nothing spectacular but a great place to hide from a thunderstorm.