I /think/ it has skid plates.. i thought i read that the SE came with some, i'll have to find out which though.. you guys are making my list enormous.. i better get crackin' =)
The specs list skid plates for the engine and fuel tank. Check to see if any other areas are vulnerable, like the area between the front bumper and the front suspension, or the transmission.
Since your baby is so well equipped, just focus on what you know you need now and worry about skid plates etc when you think/know you need them.
Rubber mats are good start.
Your truck has the 3.3 l motor. When that motor was in the Pathfinder, it had a timing belt rather than a chain. You need to check to see what your motor has and if it also has a belt, plan on replacing it at around 160,000 km (Nissan or the owners manual will tell you the correct interval).
Otherwise you are good to go. Now go get it dirty

