260 water ballast v. fixed keel
I haven't been on a fixed keel 26, but I own a Hunter water ballasted 26. The boat is a bit tender (it leans quickly) but holds. Reefing or reduction in sail is probably appropriate around 12 to 15mph depending on how much courage you have. Be that as it may, it light air, the boat sails easily and takes off relatively quickly. So, assess your typical sailing conditions before making a decision. For example, sailing on a lake with inconsistent light winds, the water ballast is a good choice. In the open ocean, even for day sailing, I would prefer a keel boat because the center of gravity of the boat is lower.