You know there are a lot of threads regarding shorts. I would look a few of them up.See if any of them might help as long as they are not to old sence styles change every year. My opinion is it is personal. I think anyone is going to feel a little sore after 40 miles no matter what. Everyone here seems to have their favorites. I have a pair of trek shorts I just love for long rides. And then another brand that the chamois is thinner and not so good. I would look into a thicker chamois maybe. But you know sometimes thicker is not better. Your seat could make a difference too. What kind of seat do you have?