I love the canvas Bimini top on my four-seater. The sun in the Southern US is brutal, and the Bimini keeps the sun off my face while letting the wind and country in.
However, my car is for touring, not beaching. Unlike this spiaggina, a Binini top costs less than $1,000 from Morgan Spares of New England, and can be quickly replaced with a standard top for bad weather.