You might try either OMEs (old man emu) or one of the established brands like Gabrials, S and w, or Bilsteins.
I had OMEs on my 4Runner and after 150km thought I'd replace them, even though they were working OK - I just wanted best performance as I was doing 100km+ a day on dirt roads.
So fitted Ranchos all round (5000 series) - bloody things were not as good as the OMEs that I took off! Rancho seem to spend lots on advertising, but not much on development or making a quality product. Were just a waste of money but left them on for 50ks then put the OMEs back on as the performance of the Ranchos had deteriorated to the point of being dangerous.
David