My wife and I are looking to purchase a 21 ft above ground pool. We live in Florida and we're looking at the Aurora from pool Factory. We're trying to decide on what liner. We were thinking thicker the better. So we were looking at the 40 gauge liner. We're reading a couple of things that thicker is not better. What does everyone say here? Thank you so much. It's a lot of money we want to make sure we purchase the right one. The image below has us second guessing ourselves.