Oeh, only found out about this thread now! Huge Epica fan here
I've been to their anniversary show (Retrospect), that was so incredibly good with the 70 people strong choir and orchestra. If you're curious, check out the Retrospect DVD!
I've noticed Simone getting a lot better over the years and she's really an example to me, since I'm singing as well. Besides, I think Mark still writes the most creative and beautiful music after all these years, which speaks of real talent.