ORIGINAL: ubeensniped
If it's a Jeep, I'd go with Old Man Emu or Rubicon Express. Least amount of sag after years of abuse. Also RE has a nice long arm setup for Jeeps. I've heard for American trucks that skyjacker is the way to go.
Ditto on the RE and OME lifts they are really good jeep lifts, I have a skyjacker 4" Lift on my ranger and its had problems, the passanger side axle pivot drop bracket knocked a hole in my diffirential and the springs have sagged horribly so im going with Trailmaster they make some nice stuff.