I am of course well aware of "Vade retro, Satanam!"---Get Thee behind me Satan! Simon was called Peter the rest of his life. He was called Satan once...and I think all of us once in a while--including Popes--deserve that admonition. :)
I agree (mostly) with your reply. I guess the point I was attempting to make was that Peter being called "Rock" by Jesus is as meaningful (to me :-)) as Jesus calling him Satan. Peter was a rock and at times failed to live up to his calling.
BTW, the last time we know of Jesus speaking to Peter He called him Simon. (Minor correction to your "Peter the rest of his life...".)
Once again, congratulations on your great news!