I was in the same position as you were. The hardest coin routine I could find at the time, with limited searches, was Silver Dream by Justin Miller. That routine is beautiful when done correctly. If you get really good, you can perform a real miracle with larger, shiny coins.
On the DVD, Justin comes right out at the beginning and tells you this is hard. Don't expect to do it right away.
I'd go with that.
At the moment, I am working on CoinOne and CoinTwo, which I feel are "hard" as well.