Around the capes? Well, I dont know if I'd trust anything short of steel pilothouse cutter in those lattitudes.
If you're circumnavigating the traditional route (Red Sea/Suez and Panama Canals) I'd probably do it in a Pacific Seacraft 40. Not gonna find one for $200k that doesn't need a lot of work...but in my minds eye, its the perfect blend of features, lines, robustness with a strong history of performance.
Plus, the rig is 55' high, so you can squeeze under every bridge on the ICW, including the Julia Tuttle in Miami to stay protected all the way up an down which is what most people end up doing anyway.