Define "Swing"
I don't know about other Mac 26s, but my keel does "swing" up into the hull of the boat, and down into the water for stability under sail.Now, is it a true lead-weight, swing keel like on the Mac25, etc... no. The balast, to keep it upright, comes from the water the holding tank.From what I can tell, the 26d has a better rudder assembly. I know that my 26s is a bit wambly to steer. Nothing major- once you are used to it.Either one, at a good price, is worth it. Wife and I have had hours of fun. What's a good price? We got ours at Lake Lanier, GA for $6000. Overall, about $8,000 to 10,000 is average good price.