My Jeep came with the new 4600s. I have only used Bilsteins on all of my vehicles. I have a friend with a YJ, and he bought a 2 inch Rancho lift that came with Rancho 5ks and he absolutely hates it. I have ridden in his Jeep, but since it is leaf sprung it rides so different any way I don't have much of an opinion. I used to have a JK, and I didn't care for it, so I sold it and bought a TJ. My JK had factory Rubicon shocks so I cannot tell you if Bilsteins are good on there or not, but a JK is not the same as a TJ, so I would probably take their opinion with a grain of salt. People here have actual TJ's so for me if they say they like the Bilsteins, that would be where I would start. And actually I will probably run the OME that comes with the lift, when they fail I will replace them with Bilsteins again. That is my opinion. Good shocks really do make a difference.