Depends on what type of animal you will use it for, sheep will go through the average live stock panel but cows will not, easiest for two people to move around and if galavanized will last a life time. They are all about the same so you need to decide length and how big of an area you want to build with them some are 10’ or 16’ in length and then also consider if you need a chute to get them from the pasture over to the panel area.