Check out the rough country vendor on here as members can get a discount.
IMHO building your own lift (piecing it together) is the best way to go, however I've heard good things about RC Lifts too. Rubicon Express and OME I've heard also makes good stuff, no personal experience though. I've got a skyjacker only cause it came with the jeep when I bought it, kinda stiff though. I'll get it changed eventually.