We are in a similar situation as you. We decided on 4health as well. Our breeder is also a vet and when we inquired with her she said that a lot of her patients are on 4 health and doing quite well. She chooses to feed a mix of Raw and a much more expensive brand that I can't find locally. She also buys in bulk so it's probably cheaper through the vets office..... Just saying.
We are transitioning our pup (8 weeks and a couple days old) over to 4Health and so far so good. Stool looks pretty good, he seems to like it. I have nothing bad to say about it thus far. We are mixing in a little bit of raw as well.
I'm not sure if that answered your question but is the best feedback I have.