Hi Lindy
It is a bit of a minefield trying to chose the right food, there is so much choice these days
The foods you have mentioned are all of equally high quality, even the Autarky although its cheaper, its ingredients have not been compromised, I am told the reason it is cheaper then the others is because its VAT free
It's really something only you can decide, I have used both the JWB and now the Autarky and I only changed because Indie wouldn't eat the JWB not because of the price, although every little helps
I am no expert on dog foods, basically it comes down to whats best for your dog
Although I do think your on the right track with the ones you are considering
Have you tried getting the little sample packs from the pet store? These are FREE and it lets you see your dogs reaction to the food before you commit yourself into buying a large bag
Hope this helps you
Emma and Indie