JBG may have a 5.5 lift thats cheaper, but it may not be the one you want on your truck!! If you buy a 5.5 lift from JBG, believe me, you want their SUPER-Flex springs. The other springs are very firm and the ride will not be worth the money you are spending.
AS with most things, you get what you pay for. JBG has great components and great products, but make sure you buy their SUPER-FLEX springs (they are Deavers, which are arguably the best available). Another member had bought the cheaper springs and was not happy....not all springs are created equal. HTH! Beyond that, you can do a search and see what other members think of WH suspensions vs Duffs vs JBG vs Cage vs toms vs BCBroncos.
John