I agree with Mister C.
Also, people generally don't like being told they shouldn't get a puppy when they've already put a deposit down. Research and final decisions should be done/made before a deposit is made. When opinions are that a kennel, breeder, dog, pedigree, line, etc, isn't that great and you shouldn't get a puppy, the OP usually gets defensive and combative.
You have now said several times you like this breeder and their dogs. Why would anyone argue (or "debate") with you on that? We can't breeder bash around here, your deposit is down, you already have a dog from this breeder...why ask the questions now? Get your puppy from who YOU want to.
If you look long enough or ask enough people, you will ALWAYS find people that disagree with the decision. Some breeders on here absolutely love my dog's pedigree, others not so much. I don't care, I got him to do sport, we're doing well so far....Not going to care what others think/say about him, his breeder, his pedigree, etc....
I got him with specific goals in mind....figure out what your specific goals/expectations are for a new dog, and select a breeder/lines that will best fit those goals. Generally if you want to do sport you go to a breeder heavily involved and titling their dogs in sport....if you don't care about sport or working your dog those titles won't be as important. If you're looking for a police k9 look for lines producing working k9's. YOU have to decide what is important to you.
There are lots of threads on here about how to find a reputable breeder. I suggest decide what your expectations/goals are, read those threads, and find a breeder that fits all those things. Good luck.