I think he's perfect for the part. He always plays great villains, and that's who I think of when I think of awesome bad guys.
This one is my favorite of the series and I'm worried it's going to be ruined, either by the filmmakers or the fans. :/
There are a lot of people who haven't read book three, so I want to be careful that this one doens't get ruined.
I hope no one posts a ton of spoilers and shit.