Best Keel for Coastal and Blue Water Cruising
Given the boats you are considering, I think you know a great deal about what you want and have the experience to back that up.
I am not sure there is any appreciable difference, in normal cruising, between the wing or the fin keel. The wing keel, as I am sure you know, was developed to improve the pointing ability of an America''s Cup boat when heeled significantly.
Let me hasten to add that while I have sailed boats with wings and without, I am no expert. I have sailed where you are going and think the shallower draft of a wing is an advantage. Since there is no mud in your cruising area, getting the wing wedged in upon grounding is not a concern.
One concern, do be careful of grounding the rudder, as it may be deeper (not sure but) than the keel. In any event, the rudder can be vulnerable. But no big deal.
All the best. Please sell me your boat in 4 yrs :O)