@minnie,
Have you seen this thread?
It is a good read as these are members’s actual experience growing cherries. Please pay more attention to growers in the east coast.
@scottfsmith is probably more experienced than most with years of growing cherries and number of varieties.
I also hope @Moley will chime in as I have not heard much input from those growing the Pearl series.
I have seen people praising Lapins. I don’t know how well Rainier will do in PA. White Gold is a good choice for the east and is similar to Rainier.
Cherry is not easy to grow in the east coast. Good luck.