I just saw this topic. The Cessna Turbo 210 is the best choice. It has the fully cantilevered wing and retractible landing gear. I have a mountaineering harness that I use when flying with the door off. There are two things to consider as far as harnesses; when you need to stay in the plane, you need a harness that will keep you in, but if you have an emergency and need to get out of the plane, you have to be able to do it quickly. Another good choice, but more expensive would be Cessna 208 Caravan set up for skydiving. The Caravan is a turbine engine aircraft and doesn't have the vibration of a piston engine. I most heartily recommend ear protection. Ask me how I know, but speak up when you do.