For me personally, I need at least one locker. It's not really an option in the places I go unless I want to use my winch quite a bit. That's the reason I narrowed my search to a 98-99 100. If I was to get another 100, I'd get a 2003+, add front and rear lockers and regear. The issue I have with a 98-99 now is that if I add a front locker, I may as well regear which requires regearing the rear end too obviously. If I was doing it from scratch with a non-locked 100, the marginal cost to add a rear locker at the same time as everything else is not that great in relation to the benefits you get with the 5 speed and VSC, etc. However in your case it sounds like you don't need lockers in the front or the rear so a 2003+ would be the way to go.