AIO'S or Prefold with covers for a newborn?

Kii • Mama to Bram and Waylon💛

what do you personally think is better to make up a newborn stash AIO'S or Prefold and covers. or fitted and covers? I have 8 AIO'S so far but they're more expensive. is it worth the price to get only AIO or should I try a blend of things?