3 Link or link

Looking into buying either the Full Traction 3 link or the Rock Krawler 4 link rear set up for my Jeep Tj and I would like to do the clayton set up honestly but its out of the budget, just wondering if anyone has any experience with either of these or might have some sort of recommendations, im sittin at around 800 to spend. and are there any vendors on the site that get any of these taht I might be able to get a little off.