Don't look at the kits until you have researched the characteristics and differences between a true 4 link, 3 link, and radius (y-link) style suspension. They'll all work, sure, but depending on what you want to do with the Jeep, you may make a mistake because someone told you it was a good kit. Once you decide between the types, filter out the kits that don't fit the profile you want.
IE, I went from a 4 link (Full Traction) to a radius arm (TNT) without doing the research and regret it. Both good kits, but the suspension geometry is NOT what I was looking for with the TNT kit. Soulda done my research a bit better.