Learn the difference between a hydraulic shock and a gas-charged (Nitrogen) shock. The hydraulic shocks generally ride smoother and cost less, and the Nitrogen's are performance shocks that are better suited to bumps at speed, like Baja type woops, not what most jeepers do. There are others here who know more detail about the differences, but that's what I've found to be generally true.
I've got Skyjacker Nitro's (cuz they were free and they fit my lift) that ride stiff as a board. I've had Skyjacker Hydro's in the past and they were soft.