Seems like you have some pretty dissimilar boats in your list. The Sabre, Tartan and Bristol are quite alike conceptually and different from the others. Perhaps a first step would be to zero in on your particular trade-off of quickness vs displacement. Each of these has obvious advantages and disadvantages and you have to decide what you want to do with the boat now and in the foreseeable future.
In South Africa doing lots of boat stuff. Departure north from Cape Town around December 15th. Arrival in the Caribbean around the beginning of February, after 5300 miles or so.