I have the kryptonite Fox shock stabilizer kit. The shock with their kit is designed to be a stabilizer. It is actually also used on the dodge ram 2500 trucks. It doesn't have the force to extend like a normal shock does. It is like the Rancho shock you mentioned. I have no pull to any side when installed and I can take you hand off the wheel and it drives straight.
I stayed away from the Bilstein because of them pulling to one side.