Sorry I am late to this discussion, I don't follow this board very often. My boat is a SO40, my only problem with the boat was finding one configured the way I wanted it. You might like to read my thought process while boat searching.
Every boat is a compromise, cost, performance, maintenance, usability and comfort.
Iron keels if properly maintained are fine. One advantage is bottom paint sticks. I don't think I have ever heard of a boat being lost because of an iron keel.