Sway bars versus RAS versus SS…which one did you choose/why?

I also could not find a spring shop with the low prices quoted, but did find entire replacement spring packs for about $200 per side that are higher rated. I'm sure that there are higher capacity upper overload springs available that would only engage under heavier loads for about less but had no reason to research further for my application.

http://www.sdtrucksprings.com/hellwig-helper-springs