Don't feel guilty!!! You have EVERY right to get the puppy you want by any means you want to do it!!!
No one is going to judge you by where you got your dog/puppy. If they do then they are shallow.
It sounds like you assuming ALL breeder's are puppy mills. That is NOT the case. Dogs rescued from Puppy mills usually end up in shelters or care houses. So your going to deny a happy loving home because of the circumstances this animal had to endure prior to coming to your home?
I say "Go For IT!!!" Just because it came from a source that KNOWs about the breed of dog, trace family lines, AND can tell you where every puppy lives doesn't sound like a bad thing.
I own 4 dogs ALL rescued from different types of situations. Do you know how great it would be if I could say " I got Dirtnap from a Breeder" INSTEAD of "His owner was in a wheelchair, left him outside all day, is mostly deaf, and going blind". What a mouthful!!! Don't feel guilty about getting the things YOU want!!!