We went transatlantic in an Ohlson 38. It was big enough without being too much to handle. Try reading Practical Sailor''s reviews. They suggest that J/Boats (the J/35, for example) is one of the FEW production boats that they would consider taking on such a trip. I would second most of the above opinons on the manufacturers you asked about. Of course, if you pick the right weather, you can cross in a kayak.