I have to bite the bullet on the timing belt as well, I have 127,000 miles on my 03 and I just replaced the plugs, pcv valve, air filter and some new BFG AT Ko's (Got 104,000 miles on my last set). I keep the oil changed regularly.
Anything else I need to be worried about.........
_________________________
2003 Granite 4x4
BFG AT KO's