A non-ballasted boat will require the crew to act as ballast. Precision 165 and Precision 18 are both ballasted keel boats. The 165 uses a wing keel, and would require slightly more ramp depth to launch easily, than the Precision 18, which is ballasted shoal keel with centerboard. The P165 will probably sail more sprightly than the P18. Some people feel the P18 is more tender than other similar boats, to which I say reef early. The Precision 13, 14, 15, 16 and 185 are most commonly centerboard boats requiring crew to ballast, but the 15 and the 185 are available in a fixed ballasted keel version. If you are tired of rigging a boat, I recommend something like the P165, which only has 3 stays; less to hook up. However, the mast raising on any boat can be a chore, which gets easier with a variety of mast crutches, gin poles, or trailer cranes, or combination thereof. The smaller Com-Pac boats such as Picnic Cat and Sun Cat get much daysailer love because they are gaff rigged with simple 3 stays. A gaff rigged boat with a tabernacle hinge is easy to rig because the mast is shorter and lighter, considering the gaff holds up the peak of the sail, rather than a Bermuda/Marconi rig which requires a longer and heavier mast for tall sail area. The cat boats generally don't go to weather as well, but are great for reaches and runs. You should think about what you want out of the boat. If you just want daysails, there are many easy to rig small boats such as the West Wight Potter 15. On the other hand, if you want a usable cabin, when getting into advanced years and more limited mobility, I think a Precision 165 or WWP15 cabin may be too small and cramped. Some thought should be given to wider boats, which often have more form stability, and even with centerboards, don't require as much crew ballast.