I would start at 40 psi and work up or down in 2# increments to see what feels the smoothest for both of you. Might take a little "playing" with the shock pressure to find YOUR sweet spot. IF you can't find it, then you may want to look at the DK kit. I went with the DK kit, Kevin tuned it for my needs and I have not needed to adjust it. Big improvement for me over the stock setup. I also run the stock Dunny rears at 23#s, the same as I ran them with the stock air shocks.