If you are looking for durability, get the higher profile rim (32mm). It will handle abuse better than a standard 23mm profile rim. More mass plus the shape works together for a more durable rim. I have a 30mm rim on my long commute/touring bike and it has been exceptionally durable over the past 7 years on my bike and a couple on my friends bike. I am building a set of touring wheels right now using 30mm profile rims because I know they will handle the loads well.