Evil porcelain doll halloween costume?

I know Halloween is a long way from now, but I'm already planning my outfit. It's gonna be home-made. I've already got the make up all set up: imma wear white makeup on my face with scarlet lips, make marks on my chin like a puppet has, dark eyeshadow, cracks in my face, and fake blood on my cheek. I also have a dress picked out ( http://www1.macys.com/catalog/product/index.ognc?ID=463626&CategoryID=50686 ). I just don't know if I should use that dress because it's a little too expensive to tear up, instead of a cheaper baby doll dress that I can rip and pour fake blood on. Please tell me which you think is better, as well as any suggestions to add to the costume. Thanks soo much!