Well guys I guess I'll be the first to try the Nismo-tuned Bilsteins...
I'm really upset with my suspension (stock, 2002 w/58000 miles). I don't know if they're necessarily worn out, but they shimmy front-to-back pretty annoyingly when I come to a stop.
I've never off-roaded my X yet, but I want shocks that can do it when I finally get out there. The Nismos seem really cheap to me, though I've never purchased shocks before, but some here on the forum seem to think they are expensive on Xterraparts.com