When you say, "Sail the Atlantic" do you mean on the Atlantic or across the Atlantic? These are obviously two entirely different goals. If it is the latter then you should look at boats like the Contessa 26 and Vega 27 which are very rugged and will take you just about anywhere and are not too expensive. If you want to sail on the Atlantic and to the Bahamas (from Florida I assume), a much wider range of boats would be suitable.
Get some experience and try to sail on a variety of boats and you will get a better sense of what you want/need.
Heading back to Lake Ontario for this summer. Relatively few stops along the way from Grenada. Martinique, Guadeloupe, St. Martin (must have something to do with the French food), then Bermuda, New England and up the Hudson/Erie Canal. We were going to go via Newfoundland and Labrador but June remembered that one of the kids is getting married this summer - details, details!