Hi there,
My apologize if my post making you feeling down (dont be), i really do hope u will maximally enjoy your ps500e. They are a lovely cans too
All i said is purely based on my own experience. I believe each one of us will have a different opinion about our grado. I do like both, ps500e abd 325e. But for me, i still prefer 325e. Bcos of the mids. I feel like the mids on my 325e is more firm. More bodied. Compared to 500e. And overall sound, i feel like 325e is more balance compared to 500e. The 500e, imo, is softer and mellower compared to 325e. More bass too. But i found the 500e mids could have been a bit thicker to get a better match with its bass. Both are very good at imaging performance. But i do find the 325e has more speed, more accurate, and more realistic to the music. So this is the reason why i choose 325e over ps500e.
The ps1ke and gs1ke, based on my own experience, they do have a very good imaging still, and also able to create more room inside my head, which to me i found it quite pleasant to enjoy and gives me another experience from a grado siganture. That is why i consider these both, to be my fav amongs grado line.
Cheers.