dh and I are buying a sailboat this fall for next summer. We live on an island and would have plenty of places to use it. We are buying used and looking at between 18-27'. We are considering a fixed keel as we have heard these are more stable, however, I don't know how shallow the back bays are here. We will take some lessons but it looks like we will have to travel quite a bit for these. We know somebody who has sailed all his life and will have him look over what we are buying. Any tips?