I don't know much about NAPA filters other than they are allegedly re branded WIX filters (which is a good thing), but FRAM has a bad rep in general. Don't forget Suzuki OE filters. You can't go wrong there if you are in doubt on which to buy.
Here's a good discussion on filters. Also see the Oil Filter Study link within.
Better yet...here is the (redirected) study broken out of the post above:
Oil Filters Revealed - MiniMopar Resources
When you do change your oil, be prepared for a bloody mess. The filter is in a terrible location and when you remove it, you'll oil down the entire front end AND you! Slip your arm in to a trash bag first when pulling the filter and the clean-up effort will be lessened.
Have we discussed changing gear oils yet Gopher? :huh:
Sounds like you've got a plan.
Two different types of gear oil, right? Gl-4 and GL-5 per the manual. The diffs need hypoid gear oil, the x-fer case and trans, not.
I'd go synthetic if in the budget.
See this threads about about raising the front end to achieve the correct front diff level and a special "gun" for filling the sumps.