I agree muppet !
The best beaches are on the Gulf, not the Atlantic.
I have been quite a few beaches on both sides - St. Petes, Sanibel, Clearwater, Miami, Cocoa, Madeira and Treasure Is.
For an official Blue wave beach though, drive approx 30 miles north of Clearwater to Honeymoon island. Take the boat across to Caledisi Island. You will find one of the US's best beach. If not the best beach.
Caledisi Island gets voted in the top ten of North American beaches year after year. If you want a day at the beach, free from ALL commercialism. This is the place to go. There is a guy on the Island who hires deckchairs and because only a limited amount of people who are allowed on the island, it feels like you have got your own island.
Also, if your not much of a sun bather, there is plenty to explore on the island, as it is a wildlife sanctuary aswell.
The boat ride across costs around $8.00 each and you can leave your car in their car park on Honeymoon Is.
You will also find a small shop on the island, which provides a few snacks etc.
When you pass through Clearwater, check out the Worlds largest Speedboat aswell. This thing goes out a few times a day, in search of dolphins. I think it cost around $12.00 per adult and you can't miss it, as its a huge yellow boat.
Paul