In a routine I am working on, I can go two completely different routes based on the same principal. One is pretty good, and you end completely clean, but the routine gets long winded and I think the effect is convoluted. The other is a much more streamlined and direct presentation of the same method, but it's really hard to get clean at the end. The effect is presented in such a way that there is no reason for the audience to suspect anything, but if someone asks for the deck right after the trick, the effect is completely blown. There are many situations like this where you are forced to choose between believability and impact, and I think that there are some situations where each is appropriate. I'd be interested in hearing other people's experiences with this problem, and how they dealt with it.