it really depends on what kind of off roading you do as well. First off, stay away from the rancho kit, there's a reason they re-designed the whole thing. I don't know anyone that has the gen 2 kit, but I would still be weary.
Now, if you mostly do trail driving or general off roading, the CST kit is hard to beat. That's the reason I got it. If you want to go all out and go blazing across the desert at 90 mph, I would suggest PRG's mid travel kit. Either kit is damn near indestructable, when equipped right.
Also, read this:
http://www.titantalk.com/forums/982804-post1.html