@Legacy I started with shocks and springs. when I brought my R50 it had 31 all terrains on 15 inch steel rims. The shocks and springs were factory and absolutely shot. I managed to get a full set of front and rear shocks and springs off a wrecker from a 99 pathy that only had 50 thou on the clock so they're decent. The best bit of the score was the after market rear springs.
Next on the want to do list is a similar winch mount like what @onespiritbrain did
http://www.nissanpathfinders.net/forum/profile/39996-onespiritbrain/
What ever you need to know about repairs, mods, what does or doesnt work you'll find 99% of the answers on NPORA - I've already spent untold hours searching and reading what's what on here.
Good luck