My '08 Dodge is due for some shocks. I see Rancho has their 4 for 3 deal going on (RS9000XL). I like the adjustable shocks for more options. However, I have read that Bilsteins might be better for ...
I put Rancho RS9000XLs on my dually. They are adjusted to 9 with the camper (which never leaves the truck) and they did in fact make a big difference. Can't speak to the Bilsteins though..