Notice you have a more extreme toe-in than many on the Sarastros - pointing right at your shoulders? How far from the front wall and sides to the center of the woofer. I think our rooms are pretty similar in size.
Have you listed without the subs? How well do you find that the subs integrate with a rear firing speaker? Sorry for all the questions.
I also went from Parsifals to Sarastros last year and I hope you are enjoying them.
Cheers