Truth is most never go out road with there trucks, 4x4 or not. But good shocks are not just for off road's, there main benefit is there on road handling. Our trucks are heavy and high, this makes for alot of body roll, and handling issues. The better shocks provide a much better ride, they allow the trucks suspension to go through it's normal movement but dampen and control that movement. From pot holes to highway ride, the shocks are responsible for ride comfort and suspension control. I think Dodge has always come out with crap shocks, at least that has been my experience. Ford and Chevy on the other hand have been offering name brand aftermarket shocks for their trucks as an option, Ford has Rancho and Chevy has had Bilstien for years.
I have run many brands, the Rancho's have never lasted. Mine were RS 5000's, and leaked, you may have better luck with their RSX or 9000? I changed to the Bilstien OEM replacement shocks and loved them, they handled great and gave plenty of control. Down side is they are a little bit rougher (Firmer) ride. Now I run the twin 5150 cross over reservoir Bilstien shocks, they believe it or not ride smoother, then the single shock. I got them valved pretty soft.
You should look around for both style, brand and price. Go with what ever brand you feel comfortable with, and shop for the best price. Right now Rancho has a Factory sale that gives you 4 shocks for the price of 3, this might make a difference for you?
Good luck