You probably have a better chance at getting a good, easy to train Lab than any any other Retriever breed. Retrievers were bred for waterfowling, and their natural instincts are a significant plus. As a rule of thumb. I've found the Golden's to be the easiest going and quite trainable. That beautiful coat is a handful to maintain after a day in the loon**** marshes. Chessies are real retrievn' machines, but most of us don't get a chance to use them to their full potential. Labs seem to be the happy compromise. And despite all the Lab-owners B.S. ... it doesn't really matter what colour ( or as they say, Black, Yellow or "Taint" ... [chocolate - taint black, taint yellow ! ] ) If you look at the last 70 years or so of AKC, CKC records, you'll find more black lab
FTCH & AFTCH's than any other.
By all means, go to a reputable breeder, one where you can watch & observe both sire & dam, and where references are readilly available. Back-yard breeders charge the same as reputable breeders who are in it as a business, and just because you have a registered sire & dam, doesn't make you a "breeder" ... so look for one with a long, established, & reputable history, with loats of satisfied customers.