Motion at Sea
So it seems the answer to my question about whether the underbody affects the motion at sea is that its only one part of the equation...
The Tartan 3700 and the Pacific Seacraft 37 are different boats but similar in size and price. Having been on the Pacific Seacraft first with the broker, and also Nigel Calder in his book, telling us that this is THE boat I was duly impressed. Then going aboard the Tartan 3700 and talking to a factory rep. at the boatshow I had second thoughts.
The purpose is to go cruising in a boat that won''t make me sorry I chose it because of a unfound bais on my part before I became a knowledgeable sailor. I hope to get the help and some of the knowledge needed by asking questions of those that know something instead of those that have something to sell me.