JMO...no real informative input. From what I have heard and seen in action- Poly Performance, Teraflex, Rubicon Express, Rock Krawler are the names that I've seen under most jk rigs. Most input I've heard from these owners has been more positive than negative. Others for jk that i've seen less of are- Pro Comp, Full Traction, Rough Country, and Skyjacker. The ones that I've seen least are- Rancho, Black Diamond, and Superlift. Doesnt mean anything...as I only have personal experience with Rubicon Express...and am VERY pleased with the quality and performance, but at least that is the order of what I personally have seen out on the trails. Daystar is another one Ive seen under several rigs, but those have been budget boost...not full suspension systems. Poly Performance and Rubicon Express and Teraflex all have pretty good reputations for quality and customer service. I would certainly go with a company that caters more to jeeps and not so much full size trucks. See...no really useful info, just blabbering.