Aloha,
Its hard to provide advice without knowing more about what you hope to experience.
Any of the islands is a long travel day from Butler PA (I had to look at google maps to discover that Pittsburgh is probably the closest airport). How many weeks are you thinking?
The time of year might be important (e.g. many folks are disappointed with Princeville's winter weather).
How many hours a day do you expect to spend out and about exploring (e.g. Volcano National Park is a long drive from Waikoloa on the Big Island)?
What kind of beach & ocean activities do you hope to do?
While not everyone on TUG agrees, I recommend borrowing or buying the guide book for each island of interest
https://www.revealedtravelguides.com/
Jack