I honestly prefer the idea of using coil-overs compared to the ORI's. The ORI's are sweet, but at least with coil overs there is a mechanical part holding the vehicle up, even if you blow a seal or lose your nitrogen. I also feel (could be wrong though) that a coil over will have more tune-ablity and adjust-ablity than the ORI's (but more time consuming).
If your concerned about the cost of fancy ($$$) bump stops you could always run these, then upgrade to the real deal down the road if needed. For a rockcrawler I bet these would work fine, they are progressive rate and the same size as an air bump.
Daystar? - Driven by Design
If your sold on the ORI's I would keep wheeling the crap out of your truck and keep collecting parts, maybe even build a rear bumper

(JK)! Once you get all the big ticket items in (including the ORI's), then you can start cutting. I would not try to set up the suspension without them, there is just too many variables that come into play when setting up a link suspension and you do not want to do it twice. Also, just because they say 10 weeks does not mean you will have them in 10 weeks. It could be the middle of winter before you see them!