Since you won't reach PHT much before 7pm and you'll need to leave there by 8am.... I vote for staying near the airport.

If the airport Hilton seems too sterile, then you can go into Narita City itself. Stay at the Wakamatsu Honten for a more "japanese" experience. Sure, there's no skyview swimming pool, no single-cask Lagavulin and no Romeo Y Juliettas... but you can find them anywhere... well maybe not...