I know I'm about to play the advocate's devil, but...Why don't you buy Thunderbird, and at the same time watch carefully Autograph's trailer with a pack of cards in your hand and figure out the method ?
I know what everyone is about to say, but come on, I agree that Autograph is a Killer effect (and I mean it), but it's in NO WAY a magician fooler. The sleights are known by any average magician, you just have to think a bit about the mechanics and the method. I'm sure that a lot of people here has already watched an effect and, knowing the sleights used, managed to figure out the method. As long as you don't put it on Youtube I think it's fine. Don't you ?
hey,
what are you saying bro? why should this be a magician fooler...
i'm doing my magic for layman, since i love the reactions, not to fool fellow magicians... i think and hope that most of the people do over here.
to be honest, thunderbird did not fool me a at all either, so i dont really see your point . both effects are cool, both effects are good ( in my personal opinion... )
just get both whenever you can
cheers,
aron