Something to remember too, is that only the nbs (and nnbs but those are not in consideration here) have the third row seat. I know I cart around a lot of people all the time, and while the third row can be cramped for adults, it does in a pinch and younger people don't seem to mind being back there too much, especially for short trips, so if people carrying is important that's another bonus for nbs, provided that they had the third row option.
as far as interior being nicer on the 03+, the only things that come to mind to me are the nicer stock radio and that fact that it is in a double din opening, giving you more options for expansion later (but by the same token the 03+ need a much more expensive wiring harness than the older ones), as well as slight changes to the gauge clusters appearance. Also, that was the year that the stock subwoofer (if equipped) moved from the back drivers side to the front under the console, so that could be a plus or a minus depending on what you prefer.
I don't know if the older ones had the option for steering wheel mounted controls, but those are nice if you can find them for your budget too.