I agree about the foam latex prosthetics....I prefer them to masks. I feel like incorporating parts of your own face just adds a little something, and gives you the ability to make emotional facial expressions. (Not to mention the ability to eat and drink, very important

) I have only ever used Ben Nye makeup, because that is what is available to me locally, and I've had good success with that. I bought a witch-face prosthetic from a company called
The Scream Team last year, and that was very good quality, and the makeup kit that came with it was outstanding, very smooth application. Here's a link to their site:
http://www.screamteam.com/