rough country....taller than the pc and have no probs with fitment or any issues with the lift. pc fabtech and rc theres your 3 choices anyways lol...its all really up to you and what you want to do. the pc and rc are the same lifts and installs. the rc requires u to cut a small portion off of your rear crossmember in order for the diff to be dropped and bolted whereas the pc uses a half washer instead. rc is prol 2-4" depending on the truck taller front and back all personal preference overall
Just go with the CST 7", people say they are BULLETPROOF, but are the most complicated to install as it needs welding/cutting. If you have the PRG UCA then no welding is needed though. And is very adaptable to coilovers according to PRG.
Keep in mind that it is the most expensive out of the other 3 choices.