to get some yj info up here, the main thing is leaf springs. i've had good luck with sky jacker, and rough country springs. ride nice, flex well, and no hassle warranty through quadratec. (if you wheel any real amount, take advantage of lifetime warranty) i just call up, say my springs have sagged an inch or so, new ones on the way. even soa set up.

tough country springs sucked. way too stiff. terrible ride, and 2" springs after settle were actually 4" springs (not good for the soa it was on) we actually took the packs apart, removed a leaf and replaced with a stock leaf. big pain. also only springs i've ever heard make creeking noises on the road, terrible product.

rancho, and skyjacker shocks were fine for the price. sky jackers will usually start to leak, use the lifetime warranty.

ome springs and shocks are obviously good.

these are all products i've used first hand, but i never bought just a lift kit for yj, i've always bought springs and shocks, and made everything else, usually for soa.