Hi Mike03! Welcome to the Disboards!
Sarasota/Siesta Key area is lovely. We enjoy going just a little south of Sarasota - Venice Beach. There are a couple of nice spots right on the beach there - Best Western and Inn at the Beach. Venice Beach is lovely - quiet, older area with a nice little shopping district within walking distance to the beach. We make a point of staying there every trip we take even if it's just for a day! If you search for Venice Beach on the computer, you should be able to find these hotels. As well, if you really want the Siesta Key area, search for that area and I know there are a number of nice places along Midnight Road, I believe which is right along the beach.