4-link is going to ride better, and flex better. Yes, it will hold up. Virtually all "hardcore" offroad rigs are 4-linked. You can also setup the link suspension out further (stretch) for better approach angles where leafs will stick out beyond the tires and hit things. Leaf is going to be easier to setup, but not flex as well. A 3-link (much more common in the front) with a panhard bar will be easy enough to design, and not much more expensive than leafs. If you want an off-the-shelf solution, check out what Trail Tough's got. They might have to custom make you a kit, but I'm sure Brent can let you know...