I'm running 5100s in the back witn ome springs, not sure clip on rear. Front i think is next to highest. I was afraid 700lb was going to be too much but James at the truck shop said he would let me try it with the 700lb, if it was too stiff we would do a 1/4" spacer with the stock 6112 600lb spring. The installer drove it and said it was amazing but in the middle clip I still had 2 1/2" lift and i wanted a full 3" lift so he went up two clips and we got it up to 3 1/2" with no spacer. Great ride. I have an 2003 with fj springs and 5100s and the ride is about the same firmness but front has more dampening. I also have built right uca with uniballs.
Running bfg 275/70/17s
Went to tierra del sol event in ocitillo wells this past weekend and the truck did amazing offroad. I like a slightly firmer feeling because I like to go faster than most and suck up bigger bumps.