We are in the process of replacing some wood trim on the exterior of our house. The house has lap side hardi plank and we are going to an Smart Panel type trim. So, some caulking will be in order. I've heard that Big Stretch, Tower Tech and Quad OSI are good caulks. On our site we get plenty of sun and heat and then rain in the winter. Based on your experience, what's your take on the best caulk?

Thanks