Dilemma: Where to publish?
Usually appeals are not a good idea, but in this case it might be your best choice.  It is very odd for an editor to &quot;suggest&quot; appeal.
https://journals.aps.org/authors/editorial-appeal-procedures
Appeals can only be on the basis of procedure (not science!).  The procedure says decisions are based on review by referees.  Five of six referees said the paper should be published in a physical review journal.  Therefore at least one of the three rejections is in error.
If your appeal is not successful, find a good journal elsewhere to try.