Even if you don't decide on raw, the Feline Future site (I feed this product) gives great insight to feline nutrition facts & fiction.
Feline Instincts has also a good info site, both are willing for anyone to e-mail them concerning their fur buddy, so you don't necessarily have to be a customer.
I think the most important thing is, it dosn't hurt to be interested in what goes into our lovelies diet. The more questions we ask will kick the companies into shape.