Monogram or Ambigram?

Instead of the usual monogram of our names' initials, we are thinking of using an ambigram for all stationeries to be used on the wedding day. I remember making an ambigram more than three years ago, as I was inspired by the art in Dan Brown's Angels and Demons:

But for the conventional us, we also made this monogram design:

For a modern touch on the monogram, we have this:

MC: Can you see it?

Tell us which design you like. Help us decide. :)