I like the Fiori and Carlu. I'm not a huge fan of dressy sandals, though. They never seem smart enough.
As for the diamante stuff, I think you're over-anyalizing it. It's a nice little shiny touch, and won't clash or compromise the dress at all. After all, the dress will cover the shoes and you'll only see a glimpse of them here or there as you dance or walk around.