The adjustable R9000 you're talking about - is that the "9000X" or something like that? I saw a system for $83/shock + $155 for the control unit for a total of around $500.
Also listed were Rancho "RSX" for a lot of $$, but they didn't even offer them in stock YJ length?

Since I'm new to ORV (mostly muscle cars in the past) I don't really know what I'm looking for in a shock... it seems like I want stiff for the road but soft for off-road, no? What's the prevailing opinion on this? And how much does it vary by off-road surface (i.e. sand vs. mud vs. dirtroad vs. SMALL rock-crawl, like mild riverbeds)?