$1500 for Kings ? That's the price on the OE ones without adjusters. Since you have a 6" lift that will be a custom length and you should get them tuned too
Custom lenght shocks from Kings don't have a warranty btw. Not that you need one anyways, i'm on my 3rd set of rear ones cause i ordered a custom lenght and my 2nd set wasn't what i asked. Custom lenght is extra, tuning is extra, all well worth if you need all that stuff.
This is a more realistic price directly from FilltyMotorsports for example on Custom 6" CO's from Kings with tuning, NO adjusters. With adjusters the price goes to $2300. Accutune is prob the same thing.
I'll go with Kings no questions asked, RC will never be King or Fox or Icon or Radflo or any other of the big names in suspension performance recognized for years all over the world. But at the same time, Not everybody needs that kind of performance and reputation, perhaps you want some bling and at the same time get something you can bash here and there as needed ? If i had $1000 laying around cause i want my truck to perform better than 5100's, and i didn't want 6112's with a big top spacer for example i'll prob do the RC coilovers just for the sake of it.
The Ford boys have been playing with those RC Vertex CO's since 2019, This is an F150 with a Procomp 6" lift, guy like you didn't want spacers anymore, wanted a little more performance without paying for Kings or Fox and wanted more bling as well....