There are a few kits out there that are nice, but you'll pay for it. I'm not sure if I think they are worth the money you'll shell out though.
Rubicon Express' long arm kits are not bad (I'm not a fan of the radius arm setup, but they work.) Clayton's kits are good (albeit uglier than homemade sin...) TeraFlex has a fairly good design in their
Pro LCG kit as well.
If you're after functionality (on
and off road) stay away from the Rancho, Skyjacker, ProComp, Superlift, Tuff Country... They work, but are very lack-luster in the performance category.
If you want to die on the trail/highway, then go with a Rock Krawler kit. They are awesome!
There are tons more out there, this is just
my opinion on the few that I am familiar with.