Glad to hear that Sassy is enjoying the Natural Balance. That's also what I've switched Trevor and the cats to, and they all seem to like it, as well.
For wet food, I decided that they're all getting Evanger's. Besides having top-notch ingredients, I love the fact that they produce their own food. I also add in a spoon of pumpkin and a spoon of yogurt, plus a little Sea Meal. So far, so good!
I am curently in the process of deciding what other dry food to rotate in with the Natural Balance. I went to our local pet health food store and got a bunch of samples. The cats really liked the Innova EVO (they hated the Nature's Variety.) Of course Trevor liked everything (typical Corgi!!

).
I really liked the Timberwolf Organics Black Forrest samples that the lady at the store gave me, but I am hesitant to patronize Timberwolf simply because they refuse to state who manufacture's their foods ( for a great list of who manufacture's whose foods, see this blog:
The PetsitUSA.com Blog » Pet Foods NOT on recall list ). Naturally I respect their right to protect their intellectual property / trade secrets, etc., but with what's been going on in the industry lately, I would think they would be slightly more open to answering the question of where their foods are produced. So I am still deciding on alternate kibbles for my guy and girls.