I got a 4" RCD lift and run 325/65R18 Nitto terra grapplers. The fronts rubbed on the factory front mud flaps, but after removing them its been fine. Rides good. I have been thinking lately I would love to go up another inch or so. Rear end seems to be about the same height as before. Front with no side steps isn't too hard to get into, drivers side is easy other seats take a little bit of a climb.
Probably isn't much of a big deal but main reason I went with the RCD was for the beefier radius arm drop brackets. I would have gone with an Icon 4.5" kit but ended up RCD instead. Local guy here has a 4.5" Icon kit and with stock tires vs my 4" RCD with 35's his truck was actually level if not 0.5" higher than mine.
i had a pro comp 4inch with 35 inch pro comp tires, 18 inch kmc wheels..not a bad ride, everything was there with the kit and i got a really good deal through 4 wheel parts since i bought everything at once.