CST is the way to go...do not buy a Fabtech kit, I have a 8" kit on my truck and it sucks. Rides like shit, the idler/pitmans go out every 6k miles. They finally came out with heavy duty ones that are rebuildable but....they charged me to fix their problem. I just put another 2 large in my Fabcrap lift (pitman/idler, bilsteins, hoops).
Save alot of headache and go CST.
Just remember, any lift kit you put on your truck will make it ride like shit. I would go with a four link on the rear with bags and it will ride better than stock. <----thats my next step